Fish Oil Not Necessary for Heart Health

Source > http://www.drmcdougall.com/science/heart.html

Heart Disease Prevention

The McDougall Program:
 
(Diet and Lifestyle Implications): 
Heart disease and strokes are not due to "any
deficiency in aspirin or fish oil". The wisest way to
prevent tragedies from a defective blood vessel system
is to deal with the cause: your first-line therapy
should be a low-fat, no-cholesterol diet. Add to this
sensible diet both daily exercise and healthy habits,
and you will be well on your way to protection from
heart disease. 

Current Treatment: If you do decide to take aspirin
too, you should know that small doses are just as
effective as larger doses, and cause fewer side
effects. As little as 30 mg of aspirin a day will
inactivate every platelet in your body. New platelets
must be made before any blood clotting activity
attributable to them can occur. A tablet of aspirin
for adults contains 300 mg. A tablet intended for
children, holds only 90 mg. Studies have been done
only with doses as small as one 300 mg. tablet, but
one "baby aspirin" or 1/4 of an "adult aspirin" a day
should be enough. Coated aspirin (Ecotrin) dissolves
in the small intestine, thereby avoiding irritation of
the stomach's membranes. 

In addition to marine fish, other generous sources of
platelet- inactivating omega-3 fats are available, and
all are derived from plants, and therefore will be
cholesterol-free: walnut oil and walnuts, wheat germ
oil, rapeseed oil, soybean lecithin, soybeans and
tofu, common beans, butternuts, and certain edible
seaweeds. (But don't forget the adverse effects of
oils derived from plants.) Purslane is a vegetable
eaten extensively in Greece, where the incidence of
both heart disease and cancer is low. Purslane is the
richest source of these beneficial omega-3 fats of any
plant yet studied. Because of that happy fact, you may
find this leafy vegetable becoming a popular food item
in the United States. 

Second-line therapy might include an aspirin tablet a
day for those people at high risk for a heart attack
or a stroke. In the form of leafy green vegetables and
beans the omega-3 fats would have few, if any,
drawbacks. I don't recommend fish oil. 

My Recommendations: 

Thinning the blood should be second-line therapy. Fish
fats (oils) and aspirin, if used at all, should be
thought of as second line treatment--as is true with
any medication. I prefer aspirin rather than fish oil
for almost all patients because it has fewer side
effects and costs less. 

Your primary approach is to take advantage of every
benefit that comes from correcting your diet and
lifestyle, first. Controlling self-destructive
behavior is not a "quick-easy fix." But dealing with
the cause of your health problems is the only sure way
to reach a cure. For a complete discussion of
cholesterol and heart disease see "The McDougall
Program for a Healthy Heart" Dutton 1996 in your
bookstores or order through our home page. 

DO NOT TAKE THIS INFORMATION AS PERSONAL MEDICAL
ADVICE. DO NOT CHANGE YOUR DIET, IF YOU ARE ILL, OR
MEDICATION WITHOUT THE ADVICE OF A QUALIFIED HEALTH
CARE PROVIDER (YOUR PHYSICIAN, FOR EXAMPLE). MORE
DETAILED INFORMATION IS FOUND IN THE MCDOUGALL
PROGRAM--12 DAYS TO DYNAMIC HEALTH (PLUME 1990), IN
YOUR BOOKSTORE OR CALL (800) 570-1654 TO ORDER BOOKS 


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REFERENCES 

DeWood, M. Prevalence of total coronary occlusion
during the early hours of transmural myocardial
infarction. N Engl J Med 303:897, 1980 

Antiplatelet Trialists' Collaboration. Secondary
prevention of vascular disease by prolonged
antiplatelet treatment. Br Med J 296:320, 1988 

Orme, M. Aspirin all round? Br Med J 296:307, 1988 

Yetiv, J. Clinical applications of fish oils. JAMA
260:665, 1988 

Glomset, J. Fish, fatty acids, and human health. N
Engl J Med 312:1253, 1985 

Herold, P. Fish oil consumption and decreased risk of
cardiovascular disease: a comparison of findings from
animal and human feeding trials (review). Am J Clin
Nutr 43:566, 1986 

Harris, W. Effects of a low saturated fat, low
cholesterol fish oil supplement in
hypertriglyceridemic patients--a placebo-controlled
trial. Ann Intern Med 109:465, 1988 

Glauber, H. Adverse metabolic effect of omega-3 fatty
acids in non-insulin-dependent diabetes mellitus. Ann
Intern Med 108:663, 1988 

Weiner, M. Cholesterol in foods rich in omega-3 fatty
acids (letter). N Engl J Med 315:833, 1986 

Simopoulos, A. Purslane: a terrestrial source of
omeg-3 fatty acid (letter). N Engl J Med 315:833, 1986


Hopkins, G. Polyunsaturated fatty acids as promoters
of mammary carcinogenesis induced in Sprague-Dawley
rats by 7,12-Dimethylbenz[a]anthracene. JNCI 66:517,
1981. 

Foran, J. Increased fish consumption may be risky
(letter). JAMA 262:28, 1989 

Olsen, S. Intake of marine fat, rich in
(n-3)-polyunsaturated fatty acids, may increase birth
weight by prolonging gestation. Lancet 2:367, 1986. 

Barnard, R. Effects of a low-fat, low-cholesterol diet
on serum lipids, platelet aggregation and thrombaxane
formation. Prostaglandins Leukot Med 26:241, 1987 

Saunders, T. Dietary fat and platelet function. Clin
Sci 65:343, 1983 

Meade, T. Hypercoagulability and ischemic heart
disease. Blood Rev 1:2, 1987 



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