Eat the right type of fat. Some fats are good for you, though - the monounsaturated fats found in olive oil resist oxidation and are associated with a low risk of breast cancer. Eat foods with tomato sauce. Tomatoes are rich in lycopene, an antioxidant that, in animal studies, suppresses the growth of breast cancer. Eat more soy-containing foods, such as soy milk and tofu.
Researchers believe they work by block more powerful estrogens and xenoestrogens.
Take a B-complex vitamin supplement. The B vitamins help the body break down estrogen into estriol, a non-carcinogenic form of the hormone. A B-complex supplement can often ease premenstrual syndrome, a sign of excess estrogen. Take extra vitamin E, a powerful antioxidant, to reduce your risk of breast cancer. Japanese researchers have found that some people produce low levels of catalase, a compound that helps prevent free radical formation in the body.