Thursday, December 7, 2006

Protein and cancer

Does Too Much Protein In The Diet Increase Cancer Risk? ScienceDaily 12/7/06 "American Journal of Clinical Nutrition, shows that lean people on a long-term, low-protein, low-calorie diet or participating in regular endurance exercise training have lower levels of plasma growth factors and certain hormones linked to cancer risk... people on a low-protein, low-calorie diet had considerably lower levels of a particular plasma growth factor called IGF-1 than equally lean endurance runners," says the study's first author Luigi Fontana, M.D., Ph.D., assistant professor of medicine at Washington University and an investigator at the Istituto Superiore di Sanità in Rome, Italy. "That suggests to us that a diet lower in protein may have a greater protective effect against cancer than endurance exercise, independently of body fat mass...Data from animal studies also suggest that lower IGF-1 levels are associated with maximal lifespan..."Many people are eating too many animal products — such as meat, cheese, eggs and butter — as well as refined grains and free sugars," he says. "Our intake of vegetables and fruits is low, and beans are vastly underconsumed in the U.S. and Europe these days."

Another argument for a vegetarian, or low meat diet.

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