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Dr. Dean Ornish Weighs In on Hazards of the High-Protein Trend

The government’s nutrition panel has changed its longstanding advice on dietary cholesterol. A new version of its recommendations, which will be published in the Dietary Guidelines for Americans, says that cholesterol-rich foods are no longer a concern.

All this flop-flopping has the public scratching their heads, and news headlines are proclaiming that we can all safely go back to eating meat and eggs. Now that cholesterol has been exonerated, sugar and carbs seem to be the dietary bad guys in the health world. But in a recent Op-Ed for The New York Times, Dr. Dean Ornish challenged the notion that Americans are eating too much starch and sugar and not enough meat, fat, and eggs.

He cites stats to show that Americans are eating more meat, fat, and sugar than ever. He then goes on to break down the science to establish that the meat and animal fats in many high-protein diets are linked to disease and cancer:

“Although people have been told for decades to eat less meat and fat, Americans actually consumed 67 percent more added fat, 39 percent more sugar, and 41 percent more meat in 2000 than they had in 1950 and 24.5 percent more calories than they had in 1970, according to the Agriculture Department. Not surprisingly, we are fatter and unhealthier.

The debate is not as simple as low-fat versus low-carb. Research shows that animal protein may significantly increase the risk of premature mortality from all causes, among them cardiovascular disease, cancer and Type 2 diabetes. Heavy consumption of saturated fat and trans fats may double the risk of developing Alzheimer’s disease.

A study published last March found a 75 percent increase in premature deaths from all causes, and a 400 percent increase in deaths from cancer and Type 2 diabetes, among heavy consumers of animal protein under the age of 65 — those who got 20 percent or more of their calories from animal protein.

Low-carb, high-animal-protein diets promote heart disease via mechanisms other than just their effects on cholesterol levels. Arterial blockages may be caused by animal-protein-induced elevations in free fatty acids and insulin levels and decreased production of endothelial progenitor cells (which help keep arteries clean). Egg yolks and red meat appear to significantly increase the risk of coronary heart disease and cancer due to increased production of trimethylamine N-oxide, or TMAO, a metabolite of meat and egg yolks linked to the clogging of arteries. (Egg whites have neither cholesterol nor TMAO.)”

Read the full article at The New York Times.

Dr. Ornish is a clinical professor of medicine at the University of California, San Francisco, and the author of The Spectrum and Eat More, Weigh Less.

 

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about the author

Naomi Imatome-Yun

Naomi Imatome-Yun is editor-at-large and former managing editor of Forks Over Knives. She has been a food, health, and wellness editor for over 15 years, and her work appears in USA Today, Dining Out, and Art Culinaire. Naomi is a Wall Street Journal bestselling author, and was a food expert for About.com for 8 years.

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