Women indigenous to the Far East are leaner and smaller, and are older at menarche, than their American counterparts. The predictive utility for breast cancer of these factors together vastly outweighs that of soy or soy-protein intake. To attribute the difference in breast-cancer incidence between Far Eastern women and American women largely to soy intake is scientifically indefensible. They may thus have the ability to prevent the binding of endogenous estrogens, which can promote tumors, to such receptors without themselves promoting tumors. Findings from some animal studies and in vitro experiments indeed suggest that phytoestrogens can serve as anticarcinogenic estrogen receptor blockers.
Flaxseed is . . .
According to Dr. Caroline Clifford, the NCI's Chief of Diet and Cancer, the NCI has never issued such a statement. The one quick step you can take to cut your risk of breast cancer is to consume omega-3 fatty acids every day. . . . Using supplements or safe fish sources, take 10 grams of fish oil a day if you are at high breast cancer risk . . . . The hypothesis that omega-3 fatty acids can contribute to the prevention of human breast cancer has not been adequately studied. Ingesting 10 grams of fish oil daily may have adverse effects in some women.