Mediterranean diet and exercise are protective to preventing recurrence of breast cancer.
Risk factors that may increase the risk of estrogen sensitive breast cancer include animal fats such as fried food and butter, alcohol and vitamin E (tocopherol) supplements.
Mary C Playdon , Regina G Ziegler, Joshua N Sampson, Rachael Stolzenberg-Solomon, Henry J Thompson, Melinda L Irwin, Susan T Mayne, Robert N Hoover, and Steven C Moore. Nutritional metabolomics and breast cancer risk in a prospective study First published June 28, 2017, doi: 10.3945/ajcn.116.150912 Am J Clin Nutr ajcn150912 http://ajcn.nutrition.org/content/early/2017/06/28/ajcn.116.150912.abstract?papetoc