Several population-based studies have already shown that soybean consumption is associated with reduced risk for breast, prostate and colon cancers. This latest research concluded the benefits may be due to soy's ability to lower female hormone levels.
Soybeans contain a significant quantity of estrogen-like compounds called isoflavones.
Research has shown that they inhibit cell growth and blood vessel formation and induce cells to differentiate. More studies will be needed to understand how much and how often one should consume soya foods.