In tests, an effective dosage equaled eating one-quarter of a head of cabbage a day. Lower estrogen benefits start to kick in within a week. Soybeans, including tofu, soy flour, soy milk and soy nuts, contain several anti-cancer chemicals. In animals, soy protein has blocked 65 percent of breast cancers. Eating wheat bran can reduce cancer-promoting estrogen, reports David P. Rose at the American Health Foundation.
Wheat bran ties up estrogen in the intestinal tract, causing much to be excreted.
Much research suggests that omega-3 fat in fish fights breast cancer. Rose also found that fish oil dramatically squelched the spread of human breast cancer cells injected into mice. Studies are in progress at Harvard to determine if fish oil treatments reduce the spread of breast cancer after surgery. Rutgers University researcher Rashida Karmali reported that modest supplements of fish oil suppressed signs of developing breast cancer in women at high risk. About 150 studies show that eating lots of fruits and vegetables cuts in half the odds of most cancers, including breast cancer.