"Japanese used to have low cancer rates when got most calories from rice, and ate a very low fat diet. Dietary fat increases tissue hypoxia, which increases cancer risk. Soy is high fat, at 37% fat. Elevated estrogen is a/w increased breast, uterine, prostate cancer. Some say that soy predominantly activates the "good" estrogen receptor beta (ER-B), and not the "bad" ER-A. However, if one actually looks at the Mueller paper - which is available free- it's obvious that soy is shown to activate both ER-B & A. Soy has thousands of times more estrogen than most other foods. Birth control pills are typically EE2 (Ethinyl EstraDi-ol). Why take birth control pills, when you can eat soy? Are you concerned about your hyper-masculinity? Eat more soy! Soy is goitrogenic, meaning that it can potentially decrease thyroid function. Soy contains heme iron which is unusual for a plant. Most men, and postmenopausal women are iron overloaded. They don't need to be eating heme iron. Soy increases ILGF quite a bit. Elevated ILGF is a/w increased cancer risk. Soy is often processed with hexane. Nonorganic soy is sprayed with toxic herbicides. So other than all that, Its a great food!"