Isoflavones are naturally occurring plant compounds that are particularly concentrated in soybeans Genistein, daidzein and glycitein are the major isoflavones found in soybeans. NOW® Extra Strenght Soy Isoflavones Vcaps™ have been extracted through a proprietary process that results in the highest natural levels of Genistein - a quantum leap in potency over most soy isoflavone products.