Dietary factors and risk of breast cancer: combined analysis of 12 case-control studies.
This article reviewed 12 case-controlled studies of diet and breast cancer. Women after menopause who had diets rich in saturated fat were found to be at high risk for breast cancer. Additionally, the consumption of fruits and vegetables turned out to have a protective effect on breast cancer. Vitamin C had the most significant effect on breast cancer risk in all women. The study concluded that an increased consumption of vitamin-rich foods could prevent 24% of breast cancers in postmenopausal women and 16% in premenopausal women. Further details can be found in the study.
Howe GR, Hirohata T, Hislop TG, Iscovich JM, Yuan JM, Katsouyanni K, Lubin F, Marubini E, Modan B, Rohan T. Dietary factors and risk of breast cancer: combined analysis of 12 case-control studies. J Natl Cancer Inst. 1990 Apr 4;82(7):561-9.