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There is more evidence that people who adopt a whole diet approach - such as a Mediterranean diet - have a lower risk of heart attack and cardiovascular-related death than those who follow a strictly low-fat diet. This is according to a new study recently published in The American Journal of Medicine.
To reach their findings, the investigators analyzed studies dating from 1957 up to the present day that looked at the relationship between food and heart disease.
The research team, including Dr. James E. Dalen of the Weil Foundation and the University of Arizona College of Medicine, notes that early studies linked high levels of serum cholesterol to higher intake of saturated fat, and in turn, increased rates of coronary heart disease.
Findings such as this caused the American Heart Association to recommend that individuals should limit fat intake to less than 30% of daily calories, while limiting saturated fat to 10% of daily calories and cholesterol to less than 300 mg a day.
The researchers note that a low-fat diet may lower cholesterol. But from their analysis, they found people who followed a whole diet approach, particularly the Mediterranean diet, had a greater reduction in cardiovascular death and non-fatal heart attacks than those who followed a strictly low-fat diet.
Commenting on the findings, Dr. Dalen says:
"Nearly all clinical trials in the 1960s, 70s and 80s compared usual diets to those characterized by low total fat, low saturated fat, low dietary cholesterol, and increased polyunsaturated fats.
These diets did reduce cholesterol levels. However they did not reduce the incidence of myocardial infarction or coronary heart disease deaths."
The Mediterranean diet mainly focuses on increasing intake of fruits, vegetables, whole grains, pasta and fish, eating products made from vegetable and plant oils, and eating less meat.
The investigators say this diet incorporates foods that are low in saturated fat, but it also encourages intake of monounsaturated fats that are known to lower cholesterol.
They add that their findings show consuming a variety of cardioprotective foods in a diet is better at preventing heart disease than a standard low-fat diet.
"The last fifty years of epidemiology and clinical trials have established a clear link between diet, atherosclerosis, and cardiovascular events," says Dr. Dalen.
"Nutritional interventions have proven that a 'whole diet' approach with equal attention to what is consumed as well as what is excluded is more effective in preventing cardiovascular disease than low-fat, low-cholesterol diets."
Previous research has linked the Mediterranean diet to many other health benefits.
Medical News Today recently reported on a study suggesting that diet may reduce the risk of type 2 diabetes, while other research has linked the Mediterranean diet to longer lifespan and better health.
Written by Honor Whiteman
Copyright: Medical News Today
Not to be reproduced without the permission of Medical News Today.
Diets to Prevent Coronary Heart Disease 1957- 2013: What Have We Learned?, James E. Dalen et al., published in The American Journal of Medicine, 31 December 2013. Abstract
Elsevier, news release, accessed 6 February 2014.
Visit our Cardiovascular / Cardiology category page for the latest news on this subject.
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