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More support for passing on the red meat
March 14, 2012
Last Updated: 2012-03-13 16:45:22 -0400 (Reuters Health)By Genevra Pittman
NEW YORK (Reuters Health) - People who eat a lot of red meat are more likely to die at any given time than those who go light on the burgers and hot dogs, a new study suggests.
Researchers found that the more servings of processed or unprocessed red meat people reported eating daily, the higher their chance of dying over more than a 20-year span.
"Red meat and especially processed red meat contains a lot of compounds and chemicals that have been linked to chronic disease risk," said Dr. Frank Hu, one of the study's authors from the Harvard School of Public Health -- and cooking red meat produces more carcinogens.
Research has suggested that the saturated fat and cholesterol in red meat is linked to plaque buildup in the arteries, which increases the risk of heart disease. Eating more meat was associated with an increased risk of kidney cancer in another recent study (see Reuters Health story of December 28, 2011).
Hu and his colleagues used data from two large, ongoing studies of U.S. doctors and nurses who filled out regular questionnaires about their typical eating habits as well as physical activity, smoking and family history.
The current report includes information from about 38,000 middle-aged men followed for an average of 22 years after their first survey and 84,000 women tracked for 28 years.
The lightest meat eaters reported getting half a serving or less of meat per day, while the study's biggest meat-lovers had red meat twice or three times daily.
Three ounces of unprocessed meat, one hot dog or two slices of bacon was counted as a serving.
About 24,000 study participants died over the two-plus decades that researchers followed them. Hu and his team calculated that the chance of dying was 12 percent higher for every extra serving of red meat the men and women had eaten each day.
Each extra serving was also tied to a 16 percent higher chance of dying from cardiovascular disease, in particular, and a 10 percent higher chance of dying from cancer.
That was after taking into account other aspects of health and lifestyle that could influence participants' chances of dying, like weight and smoking, as well as the rest of their diet and various socioeconomic factors.
Substituting one daily serving of red meat with fish, poultry, beans, nuts, low-fat dairy products or whole grains was tied to a seven to 19 percent lower chance of death, Hu and his colleagues reported Monday in the Archives of Internal Medicine.
"The results are not really surprisingly given that previous studies have found consumption of red meat is linked to diabetes, heart disease and certain cancers," Hu told Reuters Health.
"What's surprising is the magnitude... Even a small amount of red meat is associated with a significantly increased risk of mortality," he added.
Hu said that it's probably a combination of chemicals and compounds that are found in red meat, including saturated fat, cholesterol and lots of salt -- especially in processed meat -- that account for increased health risks in meat-eaters, although his study can't prove a cause-and-effect relationship.
Though he doesn't necessarily recommend everyone drop their burgers at once, Hu said it's not a bad idea to try to cut back on red meat, given this and other evidence of its less-than-stellar health record.
"We're not talking about everyone becoming a vegetarian -- I think a small amount of red meat is still okay as part of a healthy diet," he said.
"We're talking about no more than two or three servings of red meat a week. Basically, red meat should be an occasional part of our diet and not a regular part of our diet."
SOURCE: http://bit.ly/zGjfPu Archives of Internal Medicine, online March 12, 2012.
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