Essay on Health
Refined foods & degenerative
disease
Jonathan Stuart Christie – jonty@ix.netcom.com
I’m not a medical doctor and this is not medical advice. Your mileage may vary.
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Contents |
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Food refining causes nutrient losses Nutrient losses raise CHD risk Insulin resistance & hypertension |
Despite
every effort, medicine can neither prevent nor cure heart disease. The same goes for cancer, diabetes, dementia
and even arthritis. As a result, we
suffer horribly as we age. Medicine pays
lip service to nutrition, yet public policy allows foods depleted of essential
nutrients to reach the marketplace.
Examples include trans-fats,
refined vegetable oils and sugar.
Societies which do not eat these foods do not deteriorate as we do! Ironically, the healthy people in these
societies have almost no knowledge of nutrition. While we have a great deal, we don’t use what
we know because the food industry and the pharmaceutical companies with the complicity of government
distort this knowledge for their own purposes.
I have insulin-dependent diabetes, a
disease notorious for accelerating heart disease. When I was diagnosed at age 37, I saw the
devastation wreaked by the disease in my doctor’s waiting room and was driven
by sheer terror to search for a solution.
For years, my wife and I experimented with diets. We learned that raw vegetables are kinder to
the insulin-dependent diabetic than cooked vegetables, but I wasn’t out of the
woods. In fact, I was at my wit’s end
because I couldn’t keep my blood sugar in the normal range, and the harder I
tried, the worse the hypoglycemic episodes I suffered. Then Dr Richard Bernstein published his
low-carbohydrate approach, which is the opposite
of the medical prescription. I found
that the combination of my raw vegetables and his approach of avoiding starchy
foods like bread and potatoes worked like a charm. I eat meat and fish with (mostly) raw
vegetables and almost no refined foods, and eating this way keeps my blood
sugar stable and in the normal range. I
never gave a thought to heart disease, yet after fifteen years of eating this
way, my wife and I both have calcium
scores in the aorta of zero, which is
unusual and implies a low risk of heart disease (Pletcher
2004). I’ve researched the phenomenon and I’m
convinced I’ve found a reason why: people who have no heart disease eat
unrefined foods. Explore the evidence
with me and conclude for yourself if this is coincidence.
Kitava Islanders have no Coronary
Heart Disease
Near
The Kitavans are by all accounts a charming people with a rich culture. They have a long history of sailing their ornate, hand-carved outrigger canoes to neighboring islands and trading necklaces and carved shells in an intricate, competitive exchange of gifts. The anthropologist Bronislaw Malinowski was exiled to the island during WWI, and published his ground-breaking cultural investigation into this so-called Kula exchange in his book, Argonauts of the Western Pacific.
In spite of an abundance of food, the Kitavan Islanders are lean and their blood pressure does not rise with age. The common causes of death are infections, accidents, complications of pregnancy and senescence. Senescence means old age: the Kitavans die of old age. You can hear the cholesterol chorus chime in with “It’s their genes!”, but a visiting emigrant islander who had lived on a Western diet for many years gave the lie to this notion. He had the typical Western health pattern of high blood pressure and abdominal obesity. And besides, the researchers noted that “compared with [Westerners] … Pacific Islanders seem more prone, not less, to develop diabetes after adopting a Western lifestyle” (Lindeberg 1999).
The Kitavans eat taro, sweet potatoes, yams, fruit, fish and coconuts, and eat very little Western food such as sugar, alcohol, grains, refined vegetable oils, and trans-fats. Almost all of them smoke (78%!), all chew the betel nut, and they exercise only at the level of a moderately active Westerner. Their cholesterol levels are said to be “unfavorable.” The reason for this is that 60-year-old males average a “bad” LDL-cholesterol level of 120, and the average 60-year-old female scores even higher at 148, while a “desirable” level is less than 100. The researchers thought this was “probably due to a high intake of saturated fat from coconut”, albeit in a diet with only a low 21% calories from fat. This seems to me to be a truly awesome failure of the imagination: whatever their cholesterol picture, it must be entirely favorable since they have no heart disease whatsoever! And this is not a fluke. Interestingly, the Tokelau Islanders (among the Cook Islands in the South Pacific) eat no less than 47% of their calories as saturated (coconut) fat, and males aged 55 to 64 have cholesterol levels averaging 245, yet they, too, enjoy robust vascular health (Prior 1981).
So far, the Kitavans have lots of supposed Western risk factors but no heart disease. This suggests that cholesterol is not actually a cause of heart disease, and that saturated fat is not, in itself, dangerous! It cannot be their low-fat diet is protecting them, because this is inconsistent with the experience of the Tokelau islanders, and with that of traditional-living Eskimos who were free of heart disease while eating the most fat of any diet ever investigated. What the diets of the Kitava Islanders, the Tokelau Islanders and the Eskimo have in common is a very small amount of refined food, unlike the Western diet.
The surviving hunter-gatherer tribes are also without heart disease:
Field
studies of twentieth century hunter-gathers (HG) showed them to be generally
free of the signs and symptoms of cardiovascular disease (CVD). … In this
review we have analyzed the 13 known quantitative dietary studies of HG and
demonstrate that animal food actually provided the dominant (65%) energy
source, while gathered plant foods comprised the remainder (35%). … and a lower
omega-6/omega-3 fatty acid ratio, would have served to inhibit the development
of CVD. Other dietary characteristics
including high intakes of antioxidants, fiber, vitamins and phytochemicals
along with a low salt intake may have operated synergistically with lifestyle
characteristics (more exercise, less stress and no smoking) to further deter
the development of CVD. (Cordain 2002)
Polynesian horticulturalists, East African nomads, Eskimos and Cretans have also been studied and found to have negligible heart disease. All ate predominantly unrefined foods, and some (especially the Cretans) had characteristics such as smoking and “high” cholesterol which, were they Westerners, would put them in the high-risk category.
Significantly, the insulin levels of
the Kitava Islanders are half those
of Swedes living in
The Kitavans demonstrate that our conception of the cause of the diseases which kill us is mistaken.
US Healthcare:
Caveat emptor!
I’m a psychotherapist. Nutrition is not my field, but I started out
as an engineer so I applied my engineering skills to this new problem when I
developed diabetes at 37 years of age. I
knew I had to make careful study of how to avoid the complications this malady. I gained a PhD in Health Principles, and
eventually published a book, Food for Vitality,
on essential fatty acid disturbances in disease. The low-carbohydrate
solution I found through my researches turned out to be amazingly simple and
effective, yet it is diametrically opposite
to the prescription of the diabetes healthcare system. The price of the diabetologists’ bad advice
is complications which eventually kill most
of the diabetic population. And yet the
conventional diabetes diet was adopted directly from the American Heart
Association diet, on the principle that since diabetics suffer accelerated
heart disease, they need a heart-healthy diet.
Unfortunately, the flaws in this
diet accelerate both diabetic complications and heart disease.
When the
measures my doctor prescribed made things worse, I researched the question and
what I discovered from the scientific literature left me shocked and
appalled. For example, I learned that the
commonly-accepted idea that cholesterol causes heart disease must be wrong
because lowering cholesterol fails to prevent heart disease. This is crystal clear. However, cholesterol is very good business
for food manufacturers, drug makers, cholesterol testers, cardiologists,
surgeons, hospitals and so on. I also
learned that nutritional measures which do alleviate heart disease have been
discovered, and rediscovered, over the years, but are simply ignored if they
contradict the cholesterol idea. The healthcare
system neglects nutrition, and therefore fails those who depend on it.
Most of us believe that
Let us look at what we spend, and
what we actually get. Mirabile dictu – incredible to relate –
The
popular perception that we=re living a great deal longer than we did a century ago is
quite wrong, a figment of statistics. It
is true to say, statistically speaking, that life expectancy at birth
was 47 years in 1900 and 75 years in the year 2000, but the telling statistic
is that the life expectancy of a 65 year old male in 1900 was 12 years (i.e.
he’d live to 77), and the life expectancy of a 65 year old male in 2000 was 16
years, an increase of but four years.
The key to the puzzle is that infant mortality was 216 per 1,000 births
in 1900, and only 6.3 in 2000:
Infant
mortality has fallen. (Click on
images for large view)
Running
water, indoor plumbing and refrigeration controlled the infectious diseases and
permitted more babies to survive, but medical advances have improved our
circumstances towards the ends of our lives hardly at all. We used to die of infectious
diseases, and now we die of heart
disease and cancer,
so it’s really only the manner of our
passing that has changed:
Deaths from infections disease have fallen dramatically. Interestingly, the introduction of antibiotics and vaccines did not steepen the fall: in other words, measures such as the chlorination of water, refrigeration and improved sanitation did far more than medicine.
As
deaths from infectious diseases fell, deaths from heart disease and cancer have
risen. Mortality from heart disease is
deceptively low because the figures are age-adjusted
to the 1940 population, in which there were far fewer older people. There were 1.7 times the number of people
aged 65-84 years in 2000 than there were in 1940, which means that the
heart-death rate in 2000 was 1.7 times what the graph shows (because most heart
deaths take place in this age group.)
The 1940 point is accurate at about 300,000 deaths, and the 2000 point
would be about 1,400,000 were the graph not age-adjusted. That there has actually been an increase in the incidence of angina
corroborates this: angina almost doubled between 1978 and 1995 in a sample of
British men aged 55-59 (Lampe 2005).
We
know that heart disease is not caused by a cholesterol-lowering drug
deficiency, and that cancer is not caused by neglecting to take
chemotherapeutic agents. But the truth
is that we don’t really know what causes heart disease or cancer, and today’s
ideas don’t suggest preventive strategies or effective treatments. Healthcare
is virtually helpless to prevent these epidemics.
Medical care
itself is estimated to have caused
783,936 deaths in
2001. Among other things, there were
adverse reactions to drugs (106,000), medical errors (98,000), infections
acquired in hospitals (88,000), botched surgeries (32,000), unnecessary
procedures (37,136), even malnutrition (108,800) and, amazingly, bedsores
(115,000), making the healthcare industry itself the third leading cause of death in
To
add insult to injury, according to a Harvard
University study of 2001 data, half
of all personal bankruptcies in the
Yet
in more Aprimitive@ cultures eating their traditional
diets, people who survive childhood infections and accidents die of old age
with their faculties intact at pretty much the same age we do. The health surveys are unequivocal, the facts
inarguable. Perhaps their immunity from
our degenerative diseases is because of the higher nutrient content of their
traditional, unrefined diets. This seems
to me to be self-evident, but are we using this information to improve our
health? We don’t use this information to
improve our health because we mostly don=t know about it, and, what=s worse, we don=t know we don=t know!
There are
known knowns ... but there are also unknown unknowns.
The ones we
don=t know we don=t know.
Donald
Rumsfeld
The dissemination of this knowledge
is hindered at every turn by vested interests, media bias and medical
prejudice, and this is made possible by our trusting naďveté.
The doctor of
the future will give no medicine, he will interest his patients in the care of
the human frame, in diet and the cause and prevention of disease
Thomas Edison
But
this promised tomorrow has not come to be, and I see that this is because the
forces of misinformation are ascendant. The
price is poor health and premature death for millions, a staggering and
unimaginable toll of human misery, with chronic pain and minds lost to dementia
instead of the productive old age in strong extended families seen in
traditional societies.
So the Conventional Wisdom
fails
John Kenneth Galbraith coined the
term in his 1958 book The Affluent
Society. According to him,
conventional wisdoms are beliefs which “serve the ego”, meaning they make us
feel good by giving us a sense of belonging to the conservative orthodoxy,
confirming we are correctly oriented with regard to the issues of the day. These beliefs are articulated at all levels
of sophistication from blue-collar to university professor. With cholesterol, clever men put forward an
idea which everybody now clings to as if to a life-belt.
For what a man had rather were true he more readily
believes
Francis Bacon
Galbraith wrote that minor
disagreements with the conventional wisdom are “much cherished” and “the very vigor
of minor debate makes it possible to exclude as irrelevant, and without seeming
to be unscientific or parochial, any challenge to the framework itself”, and “…
the conventional wisdom often makes vigorous advocacy of originality a
substitute for originality itself.” But
when a serious challenge emerges, “… men react, not infrequently with something
akin to religious passion, to the defense of what they have so laboriously
learned.” In other words, the
conventional wisdom is comforting and saves us the effort of thinking for
ourselves, but is not necessarily true.
“The enemy of the conventional wisdom is not ideas but the march of
events … the fatal blow to the conventional wisdom comes when the conventional
ideas fail signally to deal with some contingency.”
In this case, we see that the Kitavan
experience disproves the cholesterol-causes-heart disease idea: they have lousy
cholesterol levels and no heart disease whatsoever. The “march of events” in this case is that more
than half of us die of heart disease in spite of changing our diets in
accordance with the cholesterol idea.
One of the attractive features of the cholesterol theory is that
everybody thinks they understand it – that LDL-cholesterol is “bad” is
self-explanatory. However:
A stupid man's report of what a clever
man says can never be accurate, because he unconsciously
translates what he hears into something he can
understand.
Bertrand Russell
If the cholesterol idea is not true, then understanding it is
indeed unfortunate for people of any intellectual level. And if the clever men who came up with the
cholesterol idea were not entirely pure of motive, then what we may actually be
seeing is the greatest marketing coup in the history of Western civilization.
My healthcare misfortunes
When
I got back trouble, my doctor prescribed traction in hospital. He wouldn’t discuss the chiropractic
alternative, and I was surprised at how angry he seemed at the very idea. I’d never seen him angry. In fact, a chiropractor quickly solved my
problem, and some time later the American Medical Association was found guilty
of violating the Sherman Antitrust Laws by conspiring to destroy the
chiropractic profession. In the Permanent Injunction, Judge
Getzendanner made it clear that the American Medical Association knew of a
study showing chiropractic to be twice as effective at half the cost of medical
treatment, and that she felt it necessary to order the Injunction sent to every
member of the Association because she had no confidence that the AMA would
change its ways unless forced to do so. My doctor, a good, kind man, was deceived by
his own Medical Association in its attempt to eliminate competition.
(The American
Medical Association is) … just another mean trust
Later,
I got chronic fatigue syndrome. I’d had it
before (I was diagnosed with infectious mononucleosis) when I was studying
Mechanical Engineering at
I
went ahead anyway because I knew the risk was negligible, and anything
that might help the aching, grinding exhaustion (seemingly worsened by sleep)
was worth trying. I took “mixed mineral
ascorbates” because they’re easier on the stomach, but I eventually learned
that the minerals themselves were important and contributed to my improvement. After three weeks of very high doses of
vitamin C – up to 140 grams per day –
I was on the road to recovery. I felt it
was a miracle. Since then, I’ve
encouraged three other chronic fatigue sufferers to treat themselves, and two
of them recovered as I did. (The third
person had a normal bowel tolerance for vitamin C of about 10 grams, so her
chronic fatigue hadn’t been caused by a bug).
But how can it be that my doctor didn’t know
about this effective, natural anti-viral treatment? After all, Dr Fred Klenner published his findings
that intravenous vitamin C cured polio when sufficiently large doses are used
as long ago as 1949! (Klenner FR, The Treatment of Poliomylitis and
Other Virus Diseases with Vitamin C, Southern
Medicine and Surgery, 1949; 111(7):209-14).
Instead, when two-time Nobel Prize winner Dr Linus
Pauling
published studies indicating that intravenous vitamin C is an effective
anti-cancer agent, Dr Charles G Moertel of the Mayo Clinic refuted his claim
with two of the most bizarre
studies
in the medical literature, which have been interpreted as bunk
designed to protect the incredible profits from the so-called chemotherapy
concession: “oncologists purchase prescription chemotherapy drugs from
their manufacturers and wholesalers, administer the drugs to patients …
Government audits have found that profit margins for doctors of 80 to 90
percent are not uncommon in these transactions.”
The
vast majority of research published since then has supported Pauling’s
approach, most recently demonstrating the likely mechanism by which intravenous
vitamin C is effective against cancer cells (Chen 2005), and providing reports of three
cases (Padayatty
1006). It may be no coincidence that Dr Moertel died
of cancer aged 66 years, while Dr Pauling took 18 grams of vitamin C per day
and died (also of cancer) at 93 years of age.
There are
striking examples of facts that have been ignored because the cultural climate
was not ready
to incorporate them into a consistent theme.
And
then there are facts which are commercially inconvenient. It seems that pharmaceutical companies
advance their interests by using advertising dollars to encourage (or the
withdrawal of advertising dollars to coerce) medical journals such as the Journal of the American Medical Association
to de-emphasize research on real results and natural remedies like vitamin C:
Medical
journals are no more than an extension of the marketing arm of the
pharmaceutical
companies.
Dr Richard Smith, editor, British Medical Journal
There seems
to be no study too fragmented, no hypothesis too trivial, no literature
citation too biased or too egotistical, no [trial] design too warped, no
methodology too bungled, no presentation of results too self-serving, no
argument too circular, no conclusions too trifling or too unjustified … for a
paper to end up in print.
Dr Durmond
Rennie, editor, Journal of the American Medical Association
Medical
schools are renowned for the paucity of their nutrition courses, and renowned also
for their massive dependence on drug company money – let alone the billion dollars
a year that the drug companies invest in the continuing education of
doctors. As a consequence, my doctor is
ignorant and distrustful of natural remedies and unknowingly acts against the
interests of his patients. He is deceived, once again for commercial
reasons, but this time by the pharmaceutical industry.
Then
I got insulin-dependent diabetes. This was a big shock, and the more I learned
about diabetic complications the more scared I became. The long-time diabetics I met in my new,
specialist doctor’s waiting room had a smorgasbord of rampant heart disease (in
spite of the supposedly heart-healthy diet), kidney failure, fading eyesight
and even “salami amputations” made necessary by galloping atherosclerosis in
their legs. A study of insulin-dependent
diabetics in
Neither a
man, nor a crowd, nor a nation can be trusted to act humanely
or to think
sanely under the influence of a great fear.
Bertrand
Russell
I
learned to inject insulin and, in my fear, I accepted unquestioningly the
prescribed (at the time) low-fat high-carbohydrate American Diabetes
Association “heart-healthy” diet. I
quickly began to suffer brutal hypoglycemic episodes. No matter how often I tested my blood sugar,
it would get away from me and I lived in fear that I’d wake up in the emergency
room. My HbA1c (glycosylated
hemoglobin) score, which indicates the risk of diabetic complications,
remained obstinately high no matter how hard I worked at the diet. Eventually, I was shocked to realize that my
doctor believed the diet wasn’t working because
I was cheating. He was wrong. I was never more serious about anything in my
life.
Eventually,
I learned of Dr Richard Bernstein. This
brilliant diabetic engineer learned by self-experimentation that eating a high-carbohydrate
diet is the height of folly when one has to depend on injected insulin because
carbohydrates quickly elevate glucose in the bloodstream which insulin acts
slowly. Dr Berstein pioneered the idea
that good blood-sugar control controls diabetic complications, an idea since
validated by the Diabetic Control and Complications clinical trial (DCCT/EDIC).
He reversed his own diabetic complications, and he had most of them, by
normalizing his blood sugar with a low-carbohydrate diet. Amazingly, he couldn’t get the medical
profession to listen to him so he qualified as a doctor himself at the age of
49. He now has a diabetes practice in
I
quickly found that the low-carbohydrate diet restored
my “hypoglycemic
awareness” (insulin-using diabetics often don’t know when their blood sugar
is falling to dangerous levels), and put an end to my hypoglycemic
episodes. In addition, the new regime
and dramatically improved my HbA1c score. The American Diabetes Association’s low-fat,
high-carbohydrate diet had caused sudden, violent blood-sugar excursions, which
I tried to control with slow-acting insulin injections. I might as well have tried to nail jelly to
the ceiling.
A graph of my HbA1c scores before and after I adopted a low-carbohydrate diet
The
HbA1c score predicts the likelihood of diabetic complications:
“patients … will accrue substantial benefit from almost-normal glycemic
control. In patients with later onset,
moderate glycemic control prevents most end-stage complications caused by
microvascular disease” (Vijan 1997).
However, in the Diabetes Control and Complications Trial, the “Intensive
Treatment” group ended the trial with an average HbA1c of 7.4%,
while the “Conventional Care” group’s average was 9.1% (DCCT/EDIC).
You can see my HbA1c score was in the Intensive Treatment
range, and fell 2 full percentage points after I began to avoid starches. When the HbA1c scores of 4,662 men
aged from 45 to 79 years were measured, those who died during the two-to-four
years of follow-up were found to have had the highest scores. The researchers calculated that for each 0.1%
reduction in HbA1c risk of death fell by 5%, so my low-carbohydrate
diet has therefore likely reduced my risk of death by 20% (Khaw
2001):
Recently,
the National Institutes of Health funded a ground-breaking study in which a
low-carbohydrate diet was shown to normalize the blood sugars of Type 2
Diabetics after just two short weeks.
The HbA1c score of the participants averaged 7.3% at the
start, and was projected to end at a normal 5.6% had the experiment continued
for two months (Boden
2005). This is just as Dr Bernstein suggests in his book, and
exactly what I experienced. There’s no
room left for doubt: the conventional dietary treatment of diabetes guarantees
that diabetics, especially insulin-dependent diabetics, will contract
life-threatening complications, no matter how hard they try to control their
blood sugar.
So,
anyway, it came as no surprise to me that key American Diabetes Association
donors included General Mills, Kraft Foods, Nestlé, Coca Cola, Hershey Foods
and Frito-Lay. The biggest sugar and
refined-carbohydrate purveyors on the planet have contrived to encourage those
who are least able to handle their products to consume them! My doctor is thrice deceived, this time by
food manufacturers. With the drug companies, the
food manufacturers have made my doctor their cat’s paw, a person used by
another as a dupe or tool.
I
thought I was out of the woods: by avoiding refined foods and starchy vegetables,
I could keep my blood sugar from wandering into dangerous territory, and, in
fact, my blood tests were better than ever
before with my LDL-cholesterol down to 111.
But my doctor pointed out that the American Heart Association guidelines
on the Detection,
Evaluation, and Treatment of High Blood Cholesterol in Adults suggests that
diabetes be treated aggressively, and that the lower my LDL-cholesterol level,
the better. He suggested I adopt the
low-fat American Heart Association “Therapeutic Lifestyle Changes” (TLC) Diet
to lower my LDL-cholesterol level; and if the diet hasn’t achieved this after
three months, that I should take a cholesterol-lowering statin drug.
Now
I was as frightened of heart disease as I had been of diabetic complications,
so frightened that I actually read the entire 284-page report! I was startled to learn that AModification of blood pressure and
lipids in people with diabetes, however, does not reduce CHD risk@ (p. II -15).
But I quickly recognized the TLC diet as a retread of my old nemesis,
the American Diabetes Association diet, with a few minor differences (such as
just 10% of calories from refined vegetable oil instead of 22%). This time, as I researched it as a tool to
lower my LDL-cholesterol, I could find almost no benefit except for the manufacturers of the foods and drugs involved. Furthermore, it became clear from the studies
I read that cholesterol isn’t even a primary cause of heart disease! But first of all, what is this coronary heart
disease of which I’m so at risk?
CHD: Coronary Heart Disease
Coronary
heart disease is a frequent complication of diabetes, and diabetics have about
4 times the risk; a male who contracts diabetes early in life may lose up to
twelve years of life. A condition which
often precedes it is atherosclerosis (from
the Greek for porridge and stone), which is found to a greater or
lesser extent in the arteries of people all over the world. It may start as early as infancy, with fatty streaks forming at points in the
arteries subject to the greatest mechanical stresses from turbulent blood flow,
or from distension from the blood-pressure pulses. Although some 35% of people have “clinically
significant” atherosclerosis, others are entirely free of it (Enriquez-Sarano
1996).
Atherosclerosis
was found in Egyptian mummies dating from 100BC, and was first described at
autopsy by Leonardo da Vinci in about 1520.
The 17th Century English physician Thomas Sydenham wrote that
“A man is as old as his arteries” because atherosclerosis eventually constricts
the coronary arteries so that the blood supply to the heart muscle is
inadequate, causing the agonizing pain of angina. However, according to the AHA, “only 20%
of coronary attacks are preceded by long-standing angina.” Interestingly, the first heart attack to be described in the medical literature was in
1912. In a heart attack, a blood clot may block an artery narrowed by atherosclerosis, cutting off
the blood supply to the heart muscle and resulting in myocardial infarction (which is a heart attack). Unstable
plaque (inflamed atherosclerotic plaque) is often found in those who eat a
Western diet, and should it rupture, the plaque contents cause a massive clot
and an immediate heart attack (Forrester 2002).
Interestingly,
coronary heart disease doesn’t always involve atherosclerosis. One in five heart victims have clean
arteries, and these deaths are thought to be caused by spasms of the coronary artery or some form of arrhythmia, in which the heartbeat becomes uncoordinated and the
heart fails to pump blood. So “Coronary Heart Disease” includes angina,
heart attack and sudden heart death, and is included in the more general term “Cardiovascular Disease” which itself
includes high blood pressure, cardiomyopathy
(in which the heart swells and pumps inefficiently), stroke and various
other circulatory problems. The
incidence of heart disease increases with age, and is truly epidemic: by 75
years of age, about 78% of men and 86% of women have cardiovascular disease,
and 17% of men and 10% of women have CHD.
Clearly,
several disease processes at work. For
starters, there’s whatever causes fatty streaks and atheroma (porridge before it turns to stone), then there’s whatever
causes calcium to enter the atheroma to cause atherosclerosis, whatever causes
the blood to clot, whatever causes arrhythmias, and whatever causes arterial
spasms. As we shall see, nutritional
factors are strong modifiers of all these disease processes.
However,
it is generally believed that high blood cholesterol is bad for the heart,
LDL-cholesterol particularly so. We are
told, and we believe, that we are helping ourselves by lowering cholesterol and
saturated fat in what we eat. The
American Heart Association has made the Therapeutic Lifestyle Changes Diet and
statin cholesterol-lowering drugs cornerstones of their strategy for lessening
risk of CHD by lowering “bad” LDL-cholesterol.
The TLC diet lowers cholesterol and saturated fat in the diet in order
to lower cholesterol and LDL-cholesterol in the bloodstream. But I quickly found that almost every tenet
of the Therapeutic Lifestyle Changes Diet is speculative. First of all, cholesterol in the diet has
little to do with cholesterol in the bloodstream!
Lowering dietary cholesterol hardly affects cholesterol in the
bloodstream
Even Dr Ancel Keys, who wrote the mammoth Seven Countries Study which investigated heart disease risk factors in seven countries and started the whole cholesterol scare, didn’t believe dietary cholesterol was important. He wrote:
In the adult man the serum
cholesterol level is essentially independent of the cholesterol intake over the
whole range of human diets (1956).
There’s no connection whatsoever between cholesterol in food and
cholesterol in blood. And we’ve known
that all along. Cholesterol in the diet
doesn’t matter at all unless you happen to be a chicken or a rabbit (1997). I’ve come to think cholesterol is not as
important as we used to think it was (1987).
Few
know that the diet-cholesterol question was studied in the Framingham Heart
Study before the cholesterol spin-doctors took over. At 22 years, the results showed that the
average blood levels of cholesterol were essentially the same in men and women
consuming less than and more than the average intake. This means, in the words of the researchers,
that “There is considerable range of cholesterol levels within the
|
|
|
Blood cholesterol (mg/dL)
|
in those consuming:- |
|
|
Average Cholesterol
Intake, mg/day |
Less than the average: |
More than the average: |
|
Men |
704 |
240 |
240 |
|
Women |
492 |
248 |
244 |
(Kannel, William B, Gordon, Tavia, The Framingham Diet
Study: Diet and the regulation of serum cholesterol.
In The
Interestingly,
data from the same source compared cholesterol intakes of healthy
|
Cholesterol intake
(mg/day) of: |
Healthy subjects |
Patients with CHD |
|
Men |
716 |
708 |
|
Women |
477 |
520 |
Their
conclusion was the only conclusion possible from this data: “There is, in
short, no suggestion of any relation between diet and the subsequent
development of CHD in the study group."
Lowering dietary cholesterol hardly affects “bad” LDL-cholesterol in the
bloodstream
We
know this because it took a meta-analysis
of locked-ward metabolic studies to show that cholesterol in the diet raises
“bad” LDL-cholesterol because the effect is small:
Dietary cholesterol causes marked hypercholesterolemia in many laboratory animals, including non-human primates. High intakes of cholesterol in humans, however, do not cause such a marked increase in serum cholesterol. Nonetheless, controlled metabolic studies in humans indicate that high cholesterol intakes raise LDL cholesterol. The degree of rise varies from person to person as is true for all nutrients. Meta-analysis of studies done in controlled settings confirm the LDL-raising action of dietary cholesterol. (652, 653). (page V-9 of the 3rd Report of the National Cholesterol Education Program Expert Panel on Detection, Evaluation and Treatment of High Blood Cholesterol in Adults)
In
fact, although there seems to be a relationship when different countries are
compared, the effect has not been found in within-population studies. As is so typical in the cholesterol-heart
disease field, this finding was blamed on confounding factors, and dismissed (Jacobs
1979). Meta-analyses are used when effects are so
small that huge numbers of subjects are necessary for a study to achieve
statistical significance. The first
study says that if I replace 60% of saturated fats with other fats, and avoid
60% of dietary cholesterol, I may lower my LDL-cholesterol by 8 to 12% (Clarke
1997). This is a draconian, near-vegetarian
prescription for a small benefit! The
second study concludes that “People desiring maximum reduction of serum
cholesterol by dietary means may have to reduce their dietary cholesterol to
minimal levels (less than 100-150mg/day) to observe modest serum cholesterol
reductions ….” (Hopkins
1992).
I
see that the National Cholesterol Education Committee has told a half-truth. I
can expect little further lowering of my already-low LDL-cholesterol by
restricting my cholesterol intake because the TLC diet advocates only about
half of the reduction in cholesterol which was found to be effective in the
locked-ward studies.
Lowering
saturated fat hardly affects cholesterol in the bloodstream either
In
the Tecumsheh
study of 957 free-living adults in
Most importantly, lowering cholesterol in the
bloodstream doesn’t lower CHD!
Incredibly,
an analysis of 22 cholesterol-lowering studies prior to the advent of statins,
in which 114,000 people participated, showed almost no change! There were only
0.3% fewer nonfatal heart attacks, the same number of fatal heart attacks, and,
worryingly, 0.3% more deaths from all
causes in the treatment groups whose cholesterol was lowered:
|
|
Treatment groups |
Control groups |
Change |
|
Nonfatal heart attacks |
2.8% |
3.1% |
-0.3% |
|
Fatal heart attacks |
2.9% |
2.9% |
0 |
|
Total deaths |
6.1% |
5.8% |
+0.3% |
Cholesterol is a lousy risk factor
And cholesterol in the bloodstream is
a very poor predictor of heart risk. An
analysis of the
In
fact, only 42% of these British men who had a blood cholesterol level above 6.5
mmol/l (253 mg/dl) went on to have heart trouble in the next 15 years. They might as well have tossed a coin – in
fact, tossing a coin would have “predicted” 50% of the men at risk!
Lowering “bad” LDL-cholesterol doesn’t necessarily lower heart risk
Suppose
the TLC Diet did work and lowered my LDL-cholesterol, will it lower my risk of
CHD? A study of an aging Italian
population has shown that risk of both heart death and all-cause mortality
actually increased dramatically as
LDL-cholesterol fell:
Figure 1. Sex-specific and age-adjusted rates of total
and cardiovascular mortality by quartiles of serum low-density lipoprotein
cholesterol at baseline. The number of
deaths is given for each quartile.
Conversion factor to conventional units is 38.6 (Tikhonoff 2005).
Apparently,
an LDL-cholesterol level of about 154mg% (4mmol/L in the units of the figure)
conferred a considerable survival advantage over the supposedly more desirable
under-100mg% (2.6mmol/L) level. This
seems to fly in face of conventional wisdom, but when Dr Uffe Ravsnkov (Ravnskov 2000) actually read the references of the
National Research Council’s massive Diet and Health: Implications
for Reducing Chronic Disease Risk report, which established LDL-cholesterol
as a risk factor for heart disease, he found the voluminous literature relies,
at bottom, on a single study of the Framingham population which concluded that:
“Under age 50 years, [LDL-]cholesterol levels are directly related with 30-year
overall and CVD mortality … after age 50 years there is no increased overall
mortality with either high or low serum cholesterol levels (Kannel
1979). But I’m 60 years of age, so my
LDL-cholesterol level is beside the point!
So
the extraordinary conclusion is forced upon me:
Cholesterol doesn’t cause heart
disease!
For every
complicated problem there is a solution that is simple, direct, understandable,
and wrong
HL Menken
There is no
nonsense too arrant to become policy with sufficient interference by the
government
Bertrand Russel
I
was so intrigued that I researched the matter further, and found that the
low-fat preoccupation was started by Dr Ancel Keys. Keys was a prolific researcher, and we have
him to thank for K-rations, the first scientifically-formulated provisions for
the American fighting man. In
researching the causes of heart disease, Keys demonized all fats at first, then
saturated fat. His research was
incredibly sloppy. For example, he
cherry-picked among the available data to make a convincing graph,
which needless to say is a deeply bogus practice:
The left graph is from Keys, showing data from 6 countries which promise a close relationship between fat in the diet and heart deaths. The right graph is from contemporary data for 22 countries, and shows that Keys cherry-picked his data to make his graph more convincing (Yerushalmy 1957). You don’t need statistics to see the Key’s persuasive relationship disappears when the data for all 22 countries are plotted, or that picking (say) Japan, Ceylon, Chile and France would seem to show that fat protects against heart death.
Keys almost certainly knew from his own investigations that although between-population studies show an association between fat and CHD mortality, within-population studies generally do not (Khor 2004). This implies that it’s not fat that causes CHD mortality, but rather some fellow-traveler such as, for example, the degree of refinement of the diets. In fact, sugar consumption correlates very closely indeed with fat consumption in 30 different countries, and the correlation between heart deaths and sugar consumption has actually been found to be stronger than that between fat and heart deaths. The authors of the study from which the graph below of sugar consumption vs. heart deaths concluded “These results suggest that associations identified in this type of investigation should be interpreted with great caution and need not necessarily reflect causal relationships, but rather suggest avenues along which further research might proceed” (Armstrong 1975):
Sugar consumption in 30 countries plotted against the heart-attack death rates. The relationship is obviously stronger than that between fat and heart death (compare Key’s graph above), yet Keys dismissed it with scorn: “ … the correlation between sugar and CHD does not remotely approach significance” (Keys 1973).
It is long
yet vigorous, like the penis of a jackass
Sydney Smith
The
Reverend Sydney Smith was talking about the quality of his sermon, but the
description fits Key’s writings: one does not get the chance to be won over by
the persuasiveness of the argument, but is rather browbeaten into
submission. Few know that Keys was on
the American Heart Association nutrition advisory
committee, or that grants from the American Heart Association Minnesota
Affiliate paid for much of his research.
Dr Key’s low-fat, low-cholesterol dietary
prescription became the official AHA dietary guidelines in 1961. I imagine that the farmers of
Since 1963, the consumption of carbohydrates steadily increased back to 500 g/d; however, fiber consumption did not increase proportionately. This finding reflects an increased consumption of refined carbohydrates over this time period (Gross 2004).
My conclusion? The Therapeutic Lifestyle Changes Diet would
be useless for me. I believe it would
likely be useless for anybody else, unless they ate nothing but fast
foods. This is so reminiscent of my
attempt to use the very similar American Diabetes Association diet to help my
diabetic control: it worsened my
blood sugar control because it had too many carbohydrates. Substituting fat for the starchy vegetables and whole grains in my diet returned
my HbA1c test result to the normal range,
indicating my risk for diabetic complications is at a minimum. And as an insulin-dependent diabetic, I
simply don’t have a choice about eating fat; the calories have to come from
somewhere, so I can’t be both low-fat and low-carbohydrate! Since carbohydrates send my blood sugar into
orbit, I eat eggs and snack on almonds and Brazil nuts instead, and the
consequence is that my cholesterol risk factors are better than they have ever
been in my life. My experience utterly
refutes the conventional prescription in diabetes management, and the
scientific literature suggests that the cholesterol hypothesis is a porky.
But
why don’t I use refined vegetable oils and avoid saturated fats? Because studies show that this approach has
risks of its own. In the UCLA Veterans
Administration trial, saturated fat was replaced by polyunsaturated soybean oil
in a 40% calories-from-fat diet and there was a small decrease in the number of
deaths from heart disease, but this
decrease was completely offset by a robust, 15% increase in deaths from cancer
in the treatment group (Dayton 1969). This is not a rogue result, for an analysis
of 8 trials employing this strategy (including some low-fat diet trials) shows
that it carries with it a 0.1% absolute
increased risk of death, meaning that it is at least ineffectual, and
probably dangerous (Ravnskov 2003).
And, amazingly:
Saturated fat is protective!
Even
in Key’s time, there was data which suggested that saturated fat rendered some
benefits. Before dismissing saturated
fat as a dietary fiend with no redeeming features, it’s necessary to explain
the high rate of stroke in
Saturated
fat (or something else) protects the peoples of
The relative risk of stroke between the highest and lowest
quintiles of saturated fat intake in a 20-year follow-up of the male
Men
of Japanese descent living in Hawaii experienced similar outcomes and the
researchers concluded with this ringing endorsement of the lipid-heart
hypothesis: “This increased risk [of eating a diet low in fat], due to an
excess risk of death from stroke and cancer, indicates that there is no overall
beneficial effect from a low fat diet in this cohort” (McGee
1985).
More
recently, saturated fat in the diet was found to protect post-menopausal women
against progression of their atherosclerosis.
The study concluded that “In postmenopausal women with relatively low
total fat intake, a greater saturated fat intake is associated with less progression of coronary atherosclerosis,
whereas carbohydrate intake is associated
with a greater progression” (Mozaffarian
2004). In this study, sugars (carbohydrates) were found to be dangerous, and saturated fats were found to be
protective!
This
raises doubt in my mind about the population studies in which saturated fat intake
appears to elevate the risk of heart disease, for most were not controlled for
carbohydrate intake. In one such
oft-quoted investigation of saturated-fat intake in the Nurses Health Study,
fiber intake (which is lowered by sugar intake, and raised by fruit and
vegetable intake) was 17 grams per day in the lowest-risk group and 10 grams in
the highest-risk group (Hu 1999).
But in this study, no distinction is made between “carbohydrates” and
“refined carbohydrates”, and low fiber implies a high intake of refined
carbohydrates which are low in fiber. So
was it the saturated fat that raised their risk of CHD, or was it sugar? Another study which compared the diets of
lean and obese individuals concluded that “Obesity is maintained primarily by a
diet that is high in fat and added sugar and relatively low in fiber” (Miller
1994).
There
is, in fact, an immense body of evidence to suggest that saturated fat in the
diet is, at the least, not harmful:
To date, some 26 long-term follow-up studies, ranging in length from 4 to 23 years, have examined the relationship between saturated fat intake and cardiovascular disease.[1-26] We are constantly told that saturated fat is a toxic "artery-clogger", yet only four of these studies have managed to detect even desperately weak statistical associations between saturated fat and CHD/CVD mortality. One study observed a protective relationship, while all the rest found no association at all.
Even more importantly, controlled clinical trials – which represent far more reliable evidence than confounder-prone epidemiological studies – have completely failed to show any CVD or total mortality benefit for individuals randomized to saturated fat restricted diets (Anthony Colpo, TheOmnivore.com 2005).
In
the reference supporting the last assertion, Dr MF Oliver wrote that “The commonly-held
belief that the best diet for prevention of coronary heart disease is a
low-saturated fat, low-cholesterol diet is not supported by the available
evidence from clinical trials. In
primary prevention, such diets do not reduce the risk of myocardial infarction
or coronary or all-cause mortality (Oliver 1997).
Worse
still, I learn that:
Low blood cholesterol is itself
not without risk
Other than that, Mrs. Lincoln, how did you enjoy the play?
Low
cholesterol is associated with a much higher risk of violent death and suicide,
so much so that six studies in which cholesterol was lowered and deaths from
heart disease reduced showed no change in the death rate from all causes
between the treatment and control groups because of increased death by violence
and suicide. The study concluded that
“The association between reduction of cholesterol concentrations and deaths not
related to illness warrants further investigation. Additionally, the failure of
cholesterol lowering to affect overall survival justifies a more cautious
appraisal of the probable benefits of reducing cholesterol concentrations in
the general population” (Muldoon
1990).
Even
more disquieting is the outcome of a huge study of 149,650 men and women which
concluded that:
In men, across the entire age range, although of borderline significance under the age of 50, and in women from the age of 50 onward only, low cholesterol was significantly associated with all-cause mortality, showing significant associations with death through cancer, liver diseases, and mental diseases. (Ulmer 2004)
Studies
suggesting a link between low cholesterol and all-cause mortality are thick on
the ground. In New Zealand Maoris, low
cholesterol predicted death, raising the relative risk of death by 2.3 in men
and 1.9 in women (Beaglehole 1980), and in Korean men, “The cholesterol
level associated with the lowest mortality ranged from 211 to 251 mg/100ml …” (Song 2000), well above the American Heart Association’s upper
limit of normal, which is 200mg%.
After age 72, the
Honolulu Heart Program study suggests that low cholesterol is associated with increased risk of death from all causes (Schatz
2001):
Quartile 1 had the lowest average cholesterol and the highest mortality: Quartile 1:
149mg% Quartile 2:
178mg% Quartile 3:
199mg% Quartile 4:
232mg% And Quartile 4 had the highest cholesterol and the lowest mortality! The dose-response
relationship is present in each quartile (see table) which suggests that
the findings are valid.
The red line represents the group with the lowest average cholesterol, 149mg%. This group had the lowest probability of survival at all times during the 6 years of follow-up, indicating that, after age 72, higher cholesterol is protective!
One reason may be that low cholesterol is associated with low
immunity. This is a robust effect which
has been found in any number of studies, although it is usually dismissed as an
artifact:
Men
occasionally stumble over the truth, but most of them pick themselves up and
hurry off as
if nothing ever happened.
Winston
Churchill
For example, a 15-year Kaiser Permanente study of 61,827 patients found “an inverse association … between total cholesterol and incidence of infections either requiring hospitalization or acquired in the hospital” (Irribarren 1998).
Triglycerides and VLDL-cholesterol: the plot thickens
In the confusing maze of blood fats,
there is a pattern which is
associated with increased risk of heart disease: elevated triglycerides raise the relative risk of CHD considerably. “… an 88 mg/dl (1.0 mmol/L) increase in
plasma triglyceride levels significantly increased the relative risk of
cardiovascular disease by approximately 30% in men and 75% in women” (Cullen
2001). It is by now generally accepted that
triglycerides are elevated by refined carbohydrates in the diet (Parks 2000), and that fasting triglycerides are
a risk factor for heart disease. Ancel
Keys, wrong in this as in so much else, heatedly dismissed these finding when
they first appeared (Keys
1963). Right for the wrong reasons, he adopted the
Cretan diet, retired to
High
triglycerides combined with low HDL-cholesterol were found in heart-attack
survivors, showing that “the ratio of triglycerides to HDL was a strong
predictor of myocardial infarction … RR in the highest compared with the lowest
quartile=16.0 …” (Gaziano 1997).
Dr Gaziano is saying that our relative risk of heart attack is 16 times
greater if we have both high triglycerides and
low HDL-cholesterol. This pattern of
blood fats is associated with insulin resistance.
It may help to understand how these different blood fats are related:
Total cholesterol = LDL-cholesterol + HDL-cholesterol + (triglycerides ÷ 5)
Triglycerides
are themselves one-fifth cholesterol!
LDL-cholesterol is actually a triglyceride- and cholesterol-delivery
system, and LDL-cholesterol is what remains after very-low-density cholesterol, VLDL-cholesterol which is made in the
liver, releases most of its triglycerides.
This confusing naming system complicates matters until one is ready to
throw up one’s hands – but to do this is to trust one’s health to people who don’t
have our best interests at heart, so to speak.
The point here is that elevated triglycerides, especially when combined
with low HDL-cholesterol, pose an exceedingly serious threat to heart health,
apparently considerably greater that any form of cholesterol, assuming that
cholesterol is, in truth, any threat at all.
A
further threat, one which is increased considerably by low-fat diets containing
refined carbohydrates, is posed by remnant
lipoproteins, which are what’s left after the triglyceride part of the
lipoprotein has been taken up by cells (Jialal 2002).
These so-called “small, dense” LDL remnants are elevated by high
carbohydrate, low fat diets:
These results indicate that the effects of low-fat diets on lipoprotein metabolism are not limited to higher fasting plasma triglyceride and lower HDL cholesterol concentrations, but also include a persistent elevation in “remnant lipoproteins”. Given the atherogenic potential of these changes in lipoprotein metabolism, it seems appropriate to question the wisdom of recommending that all Americans should replace dietary saturated fat with CHO [carbohydrates] (Abbasi 2000).
It’s
worth repeating: low-fat diets containing refined carbohydrates worsen
atherogenic remnant lipoproteins. Dr
Abbasi’s study compared low-fat diets (like the American Heart Association
Therapeutic Lifestyle Changes Diet, which is prescribed to lower high
cholesterol) with low-carbohydrate diets (like the Atkins diet). The main finding was that the low-fat diet
actually elevated risk of heart
disease. Oddly, we don’t hear much about
this pattern of increased heart risk from low-fat diets, although, as we shall
see, it is a consistent finding in studies which use refined foods among their
carbohydrate sources. Remnant
lipoproteins are violently atherogenic (Koba
2006) unless quickly
removed from the circulation by the liver, and what’s important about this
study is that it points out that carbohydrate in the diet causes a persistent elevation of these small,
dense atherogenic remnant lipoproteins.
There
is a profoundly important distinction here between simple carbohydrates, which are sugars, and starchy (complex) carbohydrates from, for example, whole
grains. Starches are actually long
chains of glucose molecules, and most starches are quite resistant to digestion
so that their glucose enters the bloodstream more slowly than sugars. It’s quite clear that simple carbohydrates
elevate triglycerides and small, dense LDL-cholesterol and lower
HDL-cholesterol (Parks
2000), and that this
pattern of fat in the blood is a virulent risk factor for heart disease (Wilson
2005). Starchy carbohydrates simply do not cause
these blood-lipid changes at any level of consumption, no doubt in part because
they come with the full complement of nutrients such as magnesium which are
well-known to be protective.
It
looks like “three strikes” for sugars.
It’s worth repeating here, to underline the point, that a prospective
study has found that the pattern of high triglycerides and low HDL-cholesterol
(which can be caused by eating refined carbohydrates) confers a remarkable 16 times greater risk of heart attack (Abbasi 2000)!
Interestingly, one way a sugary diet worsens this disturbance in the
blood fats is via alterations of mineral levels within cells, which are also
associated with insulin resistance. Now
this is a worthwhile observation, for, as we shall see, there are simple
dietary remedies. But I’m getting ahead
of myself.
What the literature really
shows
In
the first actual clinical test of the low-fat diet (the Therapeutic Lifestyle
Changes Diet is a low-fat diet) ever performed in its thirty-plus years, no benefit was found. This $415,000,000 study (funded with tax
dollars) revealed that, after eight years:
The intervention was associated
with increased risk in the 3.4% of women with baseline CVD [cardiovascular
disease] … In conclusion, this long-term dietary intervention in postmenopausal
women, intended to reduce fat intake and increase intake of vegetables, fruits,
and grains, achieved an 8.2% of energy decrease in total fat intake but only a
2.9% of energy decrease in saturated fat intake and only modest increases in
intakes of vegetables, fruits, and grains.
The intervention did not reduce risk of CHD or stroke (Howard 2006).
In other words, the low-fat diet my
doctor has prescribed for me neither increased nor decreased the risk of heart
disease among most of the study participants, but for the 3.4 percent of trial
participants with pre-existing cardiovascular disease, the relative risk of
non-fatal and fatal CHD was actually increased
by 26%!
Despite
of the slick PR of the American Heart Association, there are many in the
scientific community who simply do not subscribe to the cholesterol
hypothesis. One such is Dr Uffe
Ravnskov, an independent researcher who wrote The Cholesterol Myths. How is it that the world believes that
cholesterol kills? Because the American
Heart Association and the National Heart Lung and Blood Institute (one of the
National Institutes of Health) between them fund over 90% of heart research,
and they fund cholesterol research almost exclusively. Instead of dying a natural death, as
defective hypotheses must for science to progress, cholesterol and its
researchers are propped up on the life-support of practically unlimited funds! Science is very much like evolution in the
sense that science depends on the survival of the fittest hypothesis. If defective hypotheses are favored for
commercial reasons over fitter hypotheses, some may achieve commercial success
but provide little in the way of useful strategies for preventing heart
disease. This is to say that the
cholesterol hypothesis is 100% wrong, but it lives because it sells a
phenomenal amount of sugar-fortified low-fat foods and statin drugs.
What raises cholesterol?
Studies
through the years have revealed what really causes high cholesterol: sugar,
hypothyroidism, stress, and nutrient deficiencies.
A
study funded by NASA to discover the best diet for astronauts found that sugar
(but not glucose) profoundly elevated serum cholesterol:
Twenty-four felons aged from 24
to 43 years in the
Stress raised the cholesterol of tax accountants by an
average of 20% around April 15th (Friedman 1958), and all manner of
emotionally-arousing events, from race-car driving to examinations provoke the
same reaction (Dimsdale
1982). Correcting sub clinical hypothyroidism
lowered LDL-cholesterol by an average of 8% in one study (Kahaly
2000). “Chronic magnesium supplementation produced a significant
reduction of plasma cholesterol and LDL cholesterol, and an increase of HDL
cholesterol” in Type 2 diabetics (Corica
1994). Taking vitamin C varied an experimenter’s cholesterol level
between 230 and 140 mg% (Spittle
1971), and chromium given
with niacin lowered LDL-cholesterol by 27% (Gordon
1991).
In
summary, for 24
So does cholesterol really matter?
Dr
William Castelli, director of the
In Framingham, Massachusetts, the more saturated fat one ate, the more cholesterol one ate, the more calories one ate, the lower people's serum cholesterol ... we found that the people who ate the most cholesterol, ate the most saturated fat, ate the most calories weighed the least and were the most physically active. ... In view of this, this study fails to describe a relationship of those traditional dietary constituents, saturated fat and cholesterol, known to have an adverse effect on blood lipids, and thereby, on the subsequent development of coronary disease end points.
Dr
Castelli actually found no relation whatsoever between cholesterol or saturated
fat and heart disease in the
Marketing disguised as science?
The
fact is that some form of the worthless low-fat Therapeutic Lifestyle Changes
Diet is the medical prescription for weight loss (66% of Americans are
overweight), diabetes (7% have diabetes, and a further 40% have “pre-diabetes”) and
heart disease (24%), and it is even suggested to healthy people for the
prevention of disease! For example, the
new, 2005 USDA Food Pyramid strongly
promotes the low-fat diet to the public, but few of us have read the USDA
mission statement: … a strategic plan
[for] expanding markets for agricultural products [and] … further developing
alternative markets for agricultural products. It is bizarre that the USDA should also be
given responsibility for advising the nation on what to eat when it is also
responsible for subsidizing corn, wheat, soybeans and cotton crops to the tune
of $20bn per year and finding markets for all this bounty!
In
the Food Pyramid fine print, I learn that if I follow this diet, I have 217
“discretionary” calories left over after I have achieved all the Recommended
Daily Allowances for vitamins, minerals and the essential fatty acids. Discretionary calories are, according to the
USDA, from refined foods, and 217 calories is equivalent to about 12 teaspoons
of sugar which is the amount in one can of Coca Cola. Vanishingly few people in
The
low-fat Therapeutic Lifestyle Changes Diet has too many carbohydrates to work
for insulin-dependent diabetes, or Type 2 Diabetes. And such diets do not work very well for
weight loss: “within the United States, a substantial decline in the percentage
of energy from fat consumed during the past two decades has corresponded with a
massive increase in obesity” (Willett
1998), although low-carbohydrate diets probably do:
“consumption of high-GI carbohydrates may increase hunger and promote
overeating” (Roberts
2000). Low-fat diets provoke too much insulin
secretion to be healthy in heart disease or, in fact, for anybody at any
time. But what a clever way to market
refined grain products, sugar and refined vegetable oils to the overweight,
diabetics, heart victims and in fact the entire population: low-fat diets are
prescribed for the very problems they cause!
And, in a truly diabolical twist, the money that the food refiners have
given to the various disease Associations to establish this useless diet as the
standard of care is tax-deductible to them as a charitable contribution!
Nutrients: The missed clue
Dr
Ancel Key’s original paper on total fat consumption and mortality from coronary
heart disease cherry-picked among the countries for which data was available,
apparently because this misrepresentation fit his graph
more convincingly. Tragically, it is
apparent from a plot of all the countries for which data was available that
something other than fat consumption was affecting mortality. The countries with the lowest mortality were
The
true tragedy of the entire cholesterol fiasco is that, buried in Key’s Seven Countries Study (in which Keys
blamed saturated fat rather than total fat), there is the fascinating
information that the heart death rate in Corfu is five times that of
Crete. These neighboring Greek islands
had diets which were identical according to laboratory assessments of the
time. A similar disparity existed in
neighboring counties in
Studies
which have passed unnoticed since then reveal that the diet of
More on Cholesterol …
My
doctor’s plan for me was that I should take a statin drug if a three-month
trial of the Therapeutic Lifestyle Changes Diet didn’t lower my
LDL-cholesterol. My LDL cholesterol is
111. My doctor offers a statin drug
because the Cholesterol Assessment and Treatment guidelines
say that LDL-cholesterol should be treated aggressively in diabetics, even
though they acknowledge that AModification of blood pressure and lipids in people with
diabetes, however, does not reduce CHD risk@ (p. II -15). My cholesterol is 165, my triglycerides are
63, my ratios are good, my pulse barely gets off the peg on the treadmill ...
should be on a statin drug? I knew
little about statins except that the people I knew who were on statins
complained of their side-effects, particularly fatigue and confusion. When I looked into them, what I learned
convinced me that statins are only ever appropriate for secondary prevention,
meaning after a heart attack when the danger of another heart attack is very
high.
The trouble with statins
It’s
clear that statins work, to the extent they do work, by lowering inflammation
because studies have shown that they are effective long before the cholesterol
level drops (Ridker 2005, Nissen 2005).
But my C-reactive protein level, an
index of the amount of inflammation I suffer, is already so low as to be near
the limits of measurement. And how much
do statins actually help? Figures are
usually quoted as relative risk reductions. For example, in the West of Scotland primary
prevention trial in men with an average cholesterol level of 272, there was a
31% relative risk reduction for “coronary events” (meaning heart attack or
death from CHD) in the statin group (Shepherd 1995).
The study was of primary prevention, designed to see if a statin drug
would prevent heart trouble among healthy men (like me, although I do have
diabetes) who had high cholesterol (which I don’t have); in other words, the
study was as close to my circumstances as I could find.
The
outcome sounds very encouraging: my chance of heart trouble is cut by almost a
third if I take the statin for five years, and moreover cholesterol fell by 20%
and LDL-cholesterol fell by an even more impressive 26%. But the absolute
risk of a coronary event was 1.32% in the statin group and 1.88% in the placebo
group, giving an absolute risk
reduction of 0.56%, or 0.11% for each year of the study. Put another way, one heart attack would be prevented if 874 men took the statin for
a year! This “number needed to treat”
figure shows that encouraging relative
risk reductions are scarily misleading unless the absolute risk reduction is also given, and that this statin
treatment cuts the risk of heart trouble in men like me by only a derisory
amount.
Lies, damned
lies and statistics
Benjamin
Disraeli
But
much more troubling to me is the all-cause mortality was unchanged. In the WOSCOPS trial, the change in risk of
death from all causes was statistically insignificant! This means that for every person whose life
was saved by the drug treatment, another died of something else. I wouldn’t last long at the track if I bet
these odds – what the hell is my doctor thinking? In fact, this has proved to be the case in
several statin trials, in which the only statistically-significant results were
fewer non-fatal CHD events (Ravnskov 2000):
|
|
WOSCOPS Pravastatin |
CARE Pravastatin |
AFCAPS/TexCAPS Lovastatin |
|
|
Healthy people; High cholesterol |
CHD patients; Normal cholesterol |
Healthy people; Normal cholesterol |
|
Non-fatal CHD events: Drug Group/Control Group |
143/204 |
135/173 |
116/183 |
|
Relative Risk of Non-fatal CHD |
-22% |
-22% |
-38% |
|
|
Significant |
Significant |
Significant |
|
Deaths from CHD: Drug Group/Control Group |
38/52 |
96/119 |
11/15 |
|
Relative Risk of CHD death |
-27% |
-19% |
-27% |
|
|
Not significant |
Not significant |
Not significant |
|
Deaths from all causes: Drug Group/Control Group |
106/135 |
180/196 |
80/77 |
|
Change in Absolute Risk of Death (%) |
-0.9% |
-0.77% |
+0.09% |
|
|
Not significant |
Not Significant |
Not Significant |
A
possible interpretation is that a side-effect of statin drugs is death! The Therapeutics
Newsletter from the
And
are there side-effects? A widely-quoted
study suggests that the risk of side-effects is between 3% (Atorvastatin) and
4% (other statins), but the study itself
says the risk is 22%. Incredibly, in the body of the
review, Dr Newman (who was working for Pfizer, the manufacturer of
Atorvastatin) arbitrarily reclassified most side-effects as not
“treatment-associated” to achieve the low incidence of side-effects in her
conclusion (Newman 2003):
TABLE 3. All Completed Studies Data
Grouping: Overview of Safety, Comparing Atorvastatin With Other Statins and
Placebo
It’s clear that 45% of patients experienced one or more adverse events in the placebo group, compared with 67% in the “Other statins” group, so that the incidence of side-effects is actually 22%. There’s no explanation of what side-effects are not “treatment-associated”, so we are asked to accept the 3-4% side-effects conclusion as an act of faith! Muscle pain and weakness, numbness and tingling, congestive heart failure, cognitive impairment and depression have been reported (Enig, accessed 2006), but were obviously classified as not “treatment-associated” by Dr Newman. In the real world, it is evident that unpleasant side effects are widespread: “… approximately 50% of patients placed on a lipid-lowering drug quit taking the drug in 1 year and only 25% still take the drug 2 years after it was started” (Roberts 1996).
He who takes
medicine is ill-informed
Leonardo da
Vinci
Ominously,
animal studies suggest statin treatment causes cancer, and human trials hint
that this effect is real. In the PROSPER
trial, elderly individuals in the statin group had a relative risk of cancer of
1.25 compared to the placebo group (Shepherd
2002), and women in the
Cholesterol and Recurrent Events trial had an absolute increased risk of breast cancer of 4.2%, a relative risk
increase of no less than 15 (Sacks 1996).
Further, statin therapy does not stop the progression of calcification
of the coronary arteries, despite lowering LDL-cholesterol (Houslay
2006), and progression of
coronary artery calcification is a powerful predictor of heart death (Wayhs
2002). So, in spite of my doctor’s enthusiasm, I
can’t help but conclude that statins are at once both perilous and futile. Statin drug treatment of cholesterol for
heart disease seems to me to belong in the book Extraordinary Popular
Delusions and the Madness of Crowds (Three Rivers Press, 1995):
Why do otherwise intelligent individuals form seething masses of idiocy when they engage in collective action? Why do financially sensible people jump lemming-like into hare-brained speculative frenzies – only to jump broker-like out of windows when their fantasies dissolve? We may think that the Great Crash of 1929, junk bonds of the '80s, and over-valued high-tech stocks of the '90s are peculiarly 20th century aberrations, but Mackay's classic – first published in 1841 – shows that the madness and confusion of crowds knows no limits, and has no temporal bounds. These are extraordinarily illuminating, and, unfortunately, entertaining tales of chicanery, greed and naďveté (from a review at Amazon.com).
So
how on Earth did we end up with such lousy advice? The American Heart Association cholesterol
guidelines are a thinly-disguised sales pitch for statin drugs. They were actually written by an Expert Panel
of the National
Cholesterol Education Program. This
organization was founded by the National
Heart Lung and Blood Institute (one of the government’s National Institutes
of Health) in 1985, and consists of 41 associations like the American Diabetes
Association, American Medical Association, American Heart Association etc, plus
“media and industry representatives also
participate in the program.” Since
the various associations are largely funded by the food and pharmaceutical
industries, perhaps it is not surprising that their bias towards statin drug
treatment is so clear:
Of the nine [Expert] panel
members, six had each received research grants, speaking honoraria or
consulting fees from at least three and in some cases all five of the
manufacturers of statins. If all the
members with conflicts had recused themselves, only two would have been
left. (Detroit News editorial
The
pharmaceutical industry has cleverly put their statin advertising into the
mouth of the government! We have set the
fox to guard the chickens, with predictable results.
So if it’s not cholesterol, what is it?
Whole, unrefined foods support health
very successfully. In the 1930s, the
dentist Dr Weston
Price documented a very low rate of dental decay amongst twelve diverse
peoples, from Alaskan Eskimos to New Zealand Maoris, but only so long as they remained on their traditional, unrefined diets. In his 1939 book Nutrition
and Physical Degeneration (Keats Publishing, 15th edition, 2003), he
described well-developed skeletal structure, strong immune systems, almost no
cancer or heart disease and a striking absence of mental illness. He went on to document the precipitate
decline in health consequent on these peoples adopting refined foods: “These
primitives with their fine bodies, homogeneous reproduction, emotional
stability and freedom from degenerative ills stand forth in sharp contrast to
those subsisting on the impoverished foods of civilization – sugar, white
flour, pasteurized milk and convenience foods filled with extenders and
additives.” (WestonAPrice.org)
But
almost no one knows these things because the food refining process is so
profitable. There is a massive cash-flow
available to buy PR to drown out these truths, because refined food is more
than delicious, it is addictive, and because the high rate of disease caused by
refined food supports both the pharmaceutical industry and the medical
profession. Furthermore, once a position
is taken by researchers, public health officials and the medical profession,
then careers and reputations are on the line and the defense of the
indefensible begins.
What I have learned
The diet‑heart hypothesis
[which is, in essence, that fat in the diet causes heart disease] has been
repeatedly shown to be wrong, and yet, for complicated reasons of pride, profit
and prejudice, the hypothesis continues to be exploited by scientists, fund‑raising
enterprises, food companies and even governmental agencies. The public is being deceived by the greatest
health scam of the century.@ George V Mann MD, Ed., Coronary Heart
Disease: The Dietary Sense and Nonsense, Janus,
"Anyone who questions cholesterol usually finds his funding cut off." Paul Rosch, MD
Almost all heart disease research funding comes from the American Heart Association and the National Heart Lung and Blood Institute, and these institutions fund cholesterol studies almost exclusively. Consider further that the American Heart Association’s biggest contributors are General Mills, Heinz, Schering Plough, Merck, Bristol Meyers Squibb, Pfizer, GlaxoSmithKline, Novartis, Astra Zenica, Aventis and Bayer – food refiners and pharmaceutical houses who benefit from the sale of refined, low-cholesterol and fat-free foods and from the sale of cholesterol-lowering drugs. Research depends on funding, so if funding is lost when the focus of the research veers away from cholesterol, it’s cholesterol that will be researched!
So
cholesterol’s a sham, kept alive to sell refined foods, and sell drugs. In his book The Cholesterol Myths
(New Trends,
Our ancestors did not know better because they had only the naked eye and lacked the technology needed to discover the truth. But the proponents of the diet-heart idea ought to know. Instead, their cocksure writings demonstrate that for them the idea has become a fact, the cholesterol Earth is flat. Or is it only a game? Those of you who read this book will realize that scientists who support the diet-heart idea and who are honest must be ignorant, either because they have failed to understand what they have read or else, by blindly following the authorities, they have failed to check the accuracy of the studies written by those authorities. But some scientists must surely have realized that the diet-heart idea is impossible and yet, for various reasons, have chosen to keep the idea alive.
Cardiologist
Dr Arthur Blumenfeld surveyed 100 eminent medical scientists in the ‘70s in an
attempt to garner support for his preferred heart disease treatment, which was
the low-fat approach:
The final question in the survey asked their choice of one of two diets they considered more anti-coronary. … Over 90 of the 100 expressed a preference for a low-carbohydrate diet … In opposition to this apparent overwhelming majority opinion are the conclusions of the American Heart Association … whose diet of choice for coronary prevention is low-fat rather than low-carbohydrate. Obviously there is a basic conflict concerning rational and therapeutic diets (Blumenfeld 1974).
It’s
clear that most medical scientists disagreed completely with the American Heart
Association’s prescription – but we do not hear from them.
The world is
a dangerous place, not because of those who do evil,
but because
of those who look on and do nothing
Yet
there is dissent. The prestigious
magazine Science
published an article by journalist Gary Taubes entitled The Soft Science of
Dietary Fat in 2001, and the Journal
of American Physicians and Surgeons published Anthony Colpo’s LDL Cholesterol: “Bad”
Cholesterol, or Bad Science? in 2005.
The articles question the science behind current dietary recommendations
and outline their commercial motivations, and indeed question the motives of
the organizations promulgating the recommendations. Although these are scientific journals, these
men are not researchers and therefore do not rely on the research funding
sources which, in effect, gag researchers who must obtain future funding. It seems that scientists must let others
speak for them if they wish to stay in the game.
I
think statins and the Therapeutic Lifestyle Changes Diet are dangerously
stupid. But I’m intrigued by the Kitava
Islanders freedom from heart disease, and with Dr Weston Price’s observation
that diverse healthy populations lived on wildly different diets having in
common only that each was composed of whole foods. The industrial revolution started a migration
to the cities, which, in turn, created a demand for foods with “shelf-life”,
foods which can be transported and stored without spoilage. Whole foods, fresh from the fields or the
sea, were replaced by processed and preserved foods of lesser nutritional
quality: refined foods. What happens to
a food when it’s refined?
Food
refining causes nutrient losses
Since
at least 20% of the average citizen=s calories come from sugar,
with perhaps another 30% from refined flour and alcohol which have much or all
of their vitamins and minerals refined out of them, few of us actually consume
a balanced diet. The amounts of 21 nutrients lost in the refining of the 1200
calories of sugar and refined flour in the average citizen’s diet are easily
calculated to lie between 95% (magnesium) and 58% (selenium). We’ve thrown away the wrong parts of the
food!
Comparing
the National
Center for Health Statistics dietary data to the government’s suggested Dietary Reference Intakes
suggests that many of us don=t achieve even the Recommended Dietary Allowance of calcium,
folic acid, fiber, or magnesium. One in three of those surveyed had vitamin C deficiency or depletion, and
between 20% and 90% (depending
which study you favor) don’t take in sufficient vitamin B6. Refining removes twice the RDA for magnesium,
and fully 56% of us don’t get even
the RDA from our diets. Five times the RDA of folate is lost
(the “enrichment” of the flour does not replace all that is taken out), and the
elevated homocysteine
level of half the population tells us
they don’t get enough folate, even if we’re technically
not deficient in it. The list goes
on.
Left: Nutrient loss during flour refining; Right: One in three of us are low in vitamin C! (Figure from Hampl)
Incredibly,
this is not news. Although it seems
scandalous to me, I did not learn of it on CNN.
It is not even new, for it was remarked on in the 1939 US Department of
Agriculture Yearbook:
The chief fault of many American diets is that they provide too little of the essential minerals and vitamins. This fault is due in large measure to the fact that refined foods are consumed in such amounts that the intake of mineral and vitamin rich natural foods is lower than it should be (Food and Life, USDA Yearbook, 1939)
What
effect does this have on us? If whole
foods carry with them the nutrients needed for their metabolism and refined
foods do not, common sense
suggests Dr Weston Price was right in his belief that it’s the lack of the
missing nutrients that causes disease.
With this organizing principle in mind, let us look to the scientific
literature. This is really easy to do
this, by the way, thanks to your tax dollars at work. I simply enter the query in the National Library of
Medicine database and it returns the abstract of the article. If I want to read the whole article, I can
order it through the delightfully-named Loansome Doc
service.
I
particularly like Harvard epidemiologist Dr Walter C Willett’s population
studies because they look at what people are eating (or not eating), and if
they get, say, heart disease in the following years. Of course, such studies cannot prove that
dietary deficiencies cause heart
disease, but they can show if they are fellow travelers with some unknown
cause. So I enter “Willett WC, vitamin E
CHD” (or whatever the current nutrient of interest may be) and discover a
wealth of information.
Often, the
results of these studies are presented as “relative
risk” of heart disease, which is the ratio of the incidence of whatever’s
being investigated in the groups taking in the highest and lowest levels of a
nutrient (Barratt
2004). Thus, in Dr Eric Rimm’s
study (in which Dr Willett participated) of “Vitamin E Consumption and the Risk
of Coronary Heart Disease in Men”, the study participants were divided into
five groups. Over the four years of the
study, the quintile taking in the least vitamin E developed coronary heart
disease at the rate of 19.4 per 1000 people, while the incidence among those
taking the most was 14.4 per 1000 people.
The relative risk is the ratio
of 14.4 ¸ 19.4, which is 0.74 (which may also be stated as a relative risk reduction of 26%).
Individuals poorly nourished in E developed
CHD at the rate of 0.49%, close to the 0.5% rate found by the American Heart
Association for a 60-year-old male, which is perhaps unsurprising since 93% of
the population consumes less than the RDA for vitamin E (USDA
2005). The absolute
risk reduction was that 5 fewer people per 1000 developed CHD over the four
years of the study in the high intake group compared with the low intake group;
thus, individuals well-nourished in vitamin E had an absolute risk reduction of
(5 ÷ 4) or 0.13% per year. This absolute
risk reduction of 0.13% therefore represents about one third of the risk of CHD
for a 60-year-old male, a considerable proportion.
Thus, the absolute risk says whether
the problem is clinically significant in the study population, and the relative
risk indicates how effective the intervention is. The relative risk reduction of 26% looks
impressive, but is essentially meaningless without the absolute risk figure of 0.49%
which means being well-nourished in vitamin E halves the risk of CHD. Together, they answer the question: is the
effect of vitamin E large enough to be clinically important? When the absolute risk reduction is small, as
in the statin studies, the relative risk reduction numbers have little clinical
significance, however large they may be.
But when the absolute risk is large, the relative risk reduction is
meaningful and provides guidance on how effective the intervention is.
I have listed a number of such
studies in order of their clinical relevance.
Why these particular Rag, Tag and Bobtail
studies? Mainstream studies play down
the risks and exaggerate the benefits of drugs, advocating almost useless cholesterol
treatments on study outcomes which failed to reach significance; drugs which do
not offer a remedy for what ails me. Mainstream
nutritional recommendations have clearly done more harm than good; but, by contrast,
I believe these few studies actually show which way the wind blows.
Nutrients
lower Cardiovascular Disease risk
|
Nutrient |
How many have “low nutrient status”? |
Amount, Study population; Study duration |
Absolute Risk high-intake group (hi)/year |
Absolute Risk low-intake group (lo)/year |
(hi/lo) |
Absolute Risk Reduction/year (hi – lo)/duration |
|
Carotenoids |
44% |
<0.8βcarotene
foods>2.05/svgs/day Elderly subjects; 4.75
years |
2.23% |
4.53% |
0.54 (0.49) |
2.3% |
|
Magnesium |
67% of adults |
1142mg vs. 418mg High-risk adults; 10
years |
0.93% |
1.6% |
0.6 (0.6) |
0.63% |
|
Vitamin C |
40%(M) 32%(F) |
>800 vs. <50mg Adults; 10 years |
0.91% |
1.3% |
0.65(M) (0.69%) |
0.42% |
|
Omega-3 fish oils |
US: 0.01- 0.02g/day
Desirable: 0.65g/day |
≥3/wk Fish meals
<1/mo (not fried or fish
sandwich) Subjects ≥ 65
years; 9.3 years |
0.35% |
1.1% |
0.28 (0.32) |
0.76% Sudden |
|
Sodium |
90% > UL* of 2.3g (FNB
2004) |
<3.64 vs. >6g/day
in urine Finnish men; 10 years |
0.72%** |
0.5%** |
1.38 (1.43) |
0.22%** CVD death |
|
Potassium |
>97% |
>2.67 vs. <1.37
g/day Adults; 19 years (AI=4.7
g) |
0.38% |
0.62% |
0.72 (0.61) |
0.27% Stroke |
|
Vitamin E |
93% |
>60IU vs. <7.5IU
(M) Adult men; 4 years |
0.36% |
0.49% |
0.64(M), (0.74) |
0.13% New |
|
Sedentary lifestyle |
88% are sedentary |
Most vs. least exercise Adult men; 12 years |
0.25% |
0.41% |
1.72(M) (1.62) |
0.17% New |
|
US 5.8g/day |
4.3 vs. 1.5g/day (M) Adults; 6 years |
0.38% |
0.25% |
1.43(M) (1.5) |
0.13% New |
|
|
Hypothyroidism |
10-40% |
1-4gr vs. 0gr Armour thyroid
vs. |
0.01% |
0.22% |
0.06 |
0.9% New |
|
(Liu
2000) |
US sugar: 146lb/yr |
206 vs. 117 Adult women; 10 years |
0.09% |
0.13% |
1.98(F) (1.37) |
0.04% New |
|
Folate |
88% |
696 vs. 158µgm Adult women; 14 years |
0.06% |
0.11% |
0.69(F) (0.58) |
0.05% New |
|
Folate and B6 |
High folate and B6 give lowest RR |
Folate 696 vs. 158µgm + B6 4.6 vs. 1.1mg/day |
? |
? |
0.55(F) |
? New |
|
Vitamin B6 |
71%(M) 90%(F) |
4.6 vs. 1.1mg/day Adult women; 14 years |
0.06% |
0.09% |
0.67(F) (0.62) |
0.04% New |
|
|
|
|
|
|
|
6.1% |
Relative
Risks are controlled for age, smoking and other risk factors in most studies
and may therefore differ from “(hi/lo)”.
Absolute Risks are from the raw data, the number of deaths or new cases
in each group. *Tolerable Upper Intake
Level. **Estimated assuming a linear
dose-response relationship.
The
most striking thing about this table is that nutritional deficiencies are so
widespread as to constitute a public health scandal. My nutritional
status simply hasn’t come up in my medical examinations, yet these studies
imply that if I am well-nourished in these eight essential nutrients and avoid
unhealthful practices, my risk of the various troubles subsumed under the
rubric of cardiovascular disease may be reduced by 6.1% per year.
Carotenoids
from vegetables together with magnesium and vitamins B, C and E found in whole
foods, along with avoiding hypothyroidism and eating fish, are associated with lowered rates
of cardiovascular disease. Of course, the
iodine which helps prevent hypothyroidism comes with the package if ocean fish
are eaten. Sugar and trans-fats (the man-made fats in margarines and refined vegetable oils), and pursuing
a sedentary lifestyle add to the risk of heart disease.
The
American Heart Association 2005 Statistical Update shows that the ten-year risk of
developing cardiovascular disease (which includes coronary heart disease) for a
male aged 60 years is 15.6%, about 1.56% per year. This figure is simply dwarfed by the 6.1%
risk reduction afforded by attending to just eight of the 44 essential
nutrients, exercising and avoiding junk food.
And in the study of folate and vitamin B6, being replete in both
nutrients improved the relative risk of developing CHD from 0.67 to 0.55, so
synergy is at work here too: the more nutrients we are replete in, the better our
chances.
Furthermore,
other essential nutrients certainly contribute to CVD risk; vitamin D, for
example, is insufficient in about half the population, and low levels are
associated with high blood pressure, impaired fasting glucose and overweight (Martins
2007). Nobody has yet performed a prospective
population study to discover the strength of its association with heart risk,
but there is no question that it exists.
Thus, the annual absolute risk reduction from an unrefined diet and
healthy lifestyle is at least 6.1%. Can it really this simple? Is this the “secret” of the Kitava Islanders
robust good health?
Once you eliminate the impossible, whatever remains,
no matter how improbable, must be the truth
Sherlock Holmes
A Note on Causation
These epidemiological studies suggest that attending to nutrition and avoiding refined foods will drastically reduce the risk of CVD, but they cannot prove that poor nutrition causes CVD. In science, a causal relationship is established if there is a plausible mechanism, a dose-response relationship, consistency across populations, and verification by clinical trial. This is a summary of Dr Bradford Hill’s criteria for causation, which were used, for example, by Sir Richard Doll when he established that smoking causes lung cancer.
The studies in the table above support
dose-response relationships between nutrients and susceptibility to CVD. Interestingly, the dose-response relationship
between impoverished Western food and degenerative disease is relentlessly
detailed in the World Health Organization report Diet, Nutrition and the
Prevention of Chronic Diseases, which also establishes consistency across
populations. As refined foods enter the
diets of undeveloped countries, so too does CVD and rest of the Western
degenerative diseases. Papua,
The great natural experiment of the Kitava Islanders might be said to satisfy the requirement for verification by clinical trial. Here is a population which has not been exposed to Western foods, and which is free of cardiovascular disease and free also from the cancers and dementias which afflict so many in the West.
The final requirement: plausible mechanisms. Many plausible mechanisms are already established. After all, essential nutrients are those we can’t live without. As I read with increasing fascination the obscure research which suggests nutrients may be more effective than drugs, I learned of many plausible mechanisms I’d never dreamed of. Just as pulling a woolen thread can unravel the entire sweater, I found that, far from being the implausible imaginings of wild eccentrics, there is consistent, solid science underlying the links between lousy food and degenerative disease. One such link is insulin resistance in which the muscles, fatty tissue and the liver lose their capacity to take in glucose from the blood when stimulated by insulin. To preserve blood sugar levels in the normal range, the amount of insulin in the circulation rises so that a state of hyperinsulinism follows. The link between heart disease and insulin resistance is that some two thirds of heart patients are insulin resistant
Almost all individuals with Type 2 Diabetes and most with hypertension, cardiovascular disease, and obesity are insulin resistant, and, ominously, more than 40% of the remaining supposedly healthy individuals have it by age 70 (Ford 2002). This means that insulin resistance is a chronic progressive condition that almost all of us are incubating. Worse, the associated high insulin level is a “very good predictor of the development of CHD” (Moller 1995), conferring a relative risk of 2.2 for the development of coronary heart disease (Feskens 1994).
Insulin Resistance
I had always thought that nutritional deficiencies impaired the immune system (say), or crippled the antioxidant defense system, or that they elevated homocysteine that damaged the arterial system – that they affected some bodily system.
However, these various dietary faults all worsen insulin resistance at the level of the cell, the fundamental unit of all bodily systems. Insulin resistance contributes to heart disease: people with Coronary Heart Disease were found to have 64% worse insulin resistance than normal subjects. People with impaired glucose tolerance and Coronary Artery Disease had 98% worse insulin resistance than people with Impaired Glucose Tolerance but no Coronary Artery Disease – the “data suggest that in patients with CAD, insulin-mediated glucose metabolism is significantly impaired, and a significant correlation was noted between insulin resistance and severity of CAD” (Shinozaki 1996). In a study of 154 people referred for coronary angiography, the most insulin-resistant were nearly twice as likely to have CAD as those who retained their sensitivity to insulin (Quadros 2007):
The
fasting blood sugar figures on the graph show a continuous relationship between
the severity of CAD in this symptomatic population from low-normal (<88mg%)
via Impaired Glucose Tolerance (100-125mg%) to diabetic (>126mg%); insulin
resistance increases the incidence of CAD.
Moreover, insulin resistance predisposes to the other Western degenerative diseases: hypertension, obesity, diabetes and cancer. Remarkably, pieces of this puzzle rarely come together so the true picture can be seen: degenerative disease usually starts with insulin resistance!
On Kitava, remember, insulin levels
actually fall with age. In the figure
below, the hatched area shows how insulin rises with age in Swedes while the
line shows that the Kitava Islanders’ insulin resistance falls with age. Unlike the Swedes, the Kitava Islanders
retain their sensitivity to insulin with age, and have no degenerative disease (Lindeberg 1999):
Another clue is that healthy Western centenarians retain childhood’s high sensitivity to insulin (