Soy compounds thwart estrogen

From New Orleans, at the e.hormone 2003 Conference

Although soybeans have gained renown as a source of the isoflavones genistein and daidzein, which can mimic the activity of the hormone estrogen, those same compounds occasionally have the opposite effect and block estrogen’s activity. Now, a team of New Orleans researchers reports that a different family of soy isoflavones blocks estrogen even more consistently.