February 04, 2009
Soy Cuts Colorectal Cancer Risk

Protect your colon with soy.

A new study published in the American Journal of Clinical Nutrition explores how soyfood consumption may lower the risk of colorectal cancer, or cancer of the colon or rectum, in postmenopausal women. According to the National Cancer Institute, an estimated 71,560 American women were diagnosed with the fourth most common cancer in 2008.

Vanderbilt University School of Medicine researchers found that women who consumed at least 10 grams of soy protein daily were one-third less likely to develop colorectal cancer in comparison to women who consumed little soy. This is the amount of soy protein available in approximately one serving of tofu (1/2 cup), roasted soy nuts (1/4 cup), edamame (1/2 cup) or soy breakfast patties (2 patties).

The study observed soy intake in 68,412 women between the ages of 40 and 70, all free of cancer and diabetes prior to the initial screening. Researchers identified 321 colorectal cancer cases after participants were monitored for an average of 6.4 years. After adjusting for confounding factors, total soyfood intake was inversely associated with colorectal cancer risk among postmenopausal women.

Note that this study does not address whether soy will cut colon cancer risks in men or younger women.

I wonder if the scientists adjusted for meat consumption. People who eat soy burgers are probably less likely to eat hamburgers.

Share |      Randall Parker, 2009 February 04 11:36 PM  Aging Diet Cancer Studies

Shreela said at February 9, 2009 12:17 AM:

I'd like to see them do this study comparing soy beans to other beans, especially after reading the other article you blogged about how the more brightly colored beans had more antioxidants and something else (phenols?) than less colorful beans, even though all the beans decreased chances of breast cancer. There's so many studies coming out all the time about how healthy soy is; do any of those compare how healthy soy is compared with other beans, or just compared to people that eat meat?

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