Habitual sunscreen users have very low levels of Vitamin D which is an anti-oxidant and inhibits the initiation phase of breast cancer. Underwire bras are the worst. Pesticides collect in fatty tissue and the breast can become a reservoir. Pesticides can have an estrogenic effect. Avoid imported produce as it tends to be more heavily sprayed.
Fiber binds to estrogen in the bowel and eliminates it.
Soy products are quite rich in phytochemicals, including genistein, which prevent the initiation and promotion of breast cancer. Tomatoes, rich in lycopene, strongly correlate with a lower risk of breast cancer. Helpful bacteria and fatty acids found in yogurt inactivate the inflammatory prostaglandins and is superb for blocking cellular changes that initiate the cancer cascade. It is speculated that it is not the fat itself in yogurt that is a problem, but the hormones, antibiotics and organochlorides stored in the fat. Studies show a strong link between fat and breast cancer when the diet is high in linoleic acids, the main fatty acid in safflower, corn, soy and sunflower oils.