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The Study
Breast, Estrogens, And Nutrition
The BEAN Study is a 13-month nutritional intervention study among healthy women looking at the role of soy in lowering breast cancer risk. During the course of the study, subjects will donate urine, blood, and breast fluid samples for hormonal analyses.The study consists of two 6-month diet periods. During the high soy diet, participants consume 2 servings of soy foods a day. During the low soy diet, the subjects will be asked to limit their soy intake to more than three servings a week. Participants will be randomly selected to start in either the high or the low soy phase, but all women will participate in both phases.
Both groups will receive individualized nutritional counseling to maintain a healthy diet as recommended by the American Dietetic Association. Women in the high soy group will be provided with soy foods, such as tofu, soy nuts, soy trail mix, and soy milk. Recipes will also help participants to prepare a tasty variety of foods. Women in the low soy group will receive monthly gift cards to local grocery stores.