See: Interaction of
estrogenic chemicals and phytoestrogens with estrogen receptor β Soy isoflavone genistein has
about 4 % of 17β - estradiol's affinity for estrogen receptor α, responsible for estrogen's feminizing effects, and 87 % of its affinity for ERβ, which acts as a tumor suppressor.
You might hear people talking a lot
about chemicals in various consumer products such as shampoo, and one of the things these
chemicals all have in common is that they are
estrogenic.