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Soy Ingredients Seem To Lower Breast Cancer Risk In Premenopausal Women

November 8, 2010: 09:21 AM EST

Increased consumption of phytoestrogens, a common ingredient in dietary soy, may modify the risk of some types of breast cancer, especially those occurring before menopause, according to U.S. research. Using a food frequency questionnaire, researchers assessed dietary patterns of 683 women with breast cancer and 611 healthy women, measuring isoflavones as a dietary, rather than supplemental, intake. Women with the highest isoflavone intake had a 30 percent lower risk of developing a breast tumor, and a 60 percent lower risk of grade 1 tumor. Among premenopausal women, the highest intake of isoflavones had a 30 percent lower risk of stage I disease, a 70 percent lower risk of a tumor larger than 2 cm, and a 60 percent lower risk of stage 2 breast cancer, connections not seen among postmenopausal women.

Anne Weaver, et al., "Soy Isoflavones May Modify Risk of Breast Cancer", Presentation, AACR Frontiers in Cancer Prevention Research Conference, November 08, 2010, © The authors
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