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anniedeighnaugh

Eating less red meat

Annie Deighnaugh
10 years ago

My "that's ridiculous" thread ridiculed the way it was stated, but the article itself about avoiding red meat was actually very enlightening.

The NIH-AARP study was based on 500,000 participants, and what they found was those who ate the most red meat (about 5 oz. per day) were 30% more likely to die over a 10 year period than those who ate the least (about 2/3 oz per day).

Another study of 120,000 (Nurses' health study) had similar results over 28 years.

One serving is considered to be 3 oz of cooked unprocessed meat (steak, pork, hamburger) or 1 oz of processed meat (sausage, ham) or 1/2 oz of bacon. So one 14 oz Outback Ribeye is nearly 4 servings.

Beyond the saturated fat/LDL issue, they are finding that carnitine may be an issue, which is broken down into TMAO when the microbes in our gut digests it. The more TMAO in your system, the more likely you are to have artherosclerosis. A study of 4,000 patients going for heart evaluation found, even adjusting for risks like smoking and high blood pressure, that those with higher levels of TMAO were 50% more likely to suffer a heart attack, stroke or cardiovascular event over the next 3 years. They are working on developing a clinical test for TMAO.

Cancer risk (especially colo-rectal) is reduced when people consume less red meat due to n-nitroso compounds that are formed by bacteria in the gut.

Cooking meat at high temps causes mutagens to form which have also been associated with colo-rectal cancer risk. Marinating, pre-microwaving, frequent flipping are ways to keep the meat moister and lower temp when grilling, reducing the formation of mutagens.

More study needs to be done as to why, but based on a study of 200,000 people, the risk of type 2 diabetes increased by 32% for every 2 oz of processed meat, and 12% for every 3 oz of unprocessed meat eaten per day. Those who ate 1/4c. of nuts per day instead of meat had a 21% lower risk of diabetes. They think heme iron may play a role in damaging cells that secrete insulin.

Bottom line: eat as little red and processed meat as possible; replace it with beans, nuts, veggie protein, poultry or fish; don't take carnitine, lecithin or choline supplements.

(Above from an article published in the 6/2013 issue of Nutrition Action Letter.)

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