A new study published in the American Journal of Clinical Nutrition concluded that consumption of soy, fruits, and vegetables helps reduce the risk of developing breast cancer. Postmenopausal women who consumed plenty of soy, fruits, and vegetables had a 30 percent lower risk of developing breast cancer, compared with those who consumed relatively little of these foods. The research was based on 34,028 women in the Singapore Chinese Health Study. The longer the women had consumed these healthful foods, the less chance they had of developing breast cancer.
Butler LM, Wu AH, Wang R, Koh WP, Yuan JM, Yu MC. A vegetable-fruit-soy dietary pattern protects against breast cancer among postmenopausal Singapore Chinese women. Am J Clin Nutr. Published ahead of print February 24, 2010. doi: 10.3945/ajcn.2009.28572.