Genistein is an isoflavone phytonutrient derived from soy. It is an extremely potent antioxidant and has evidence supporting its anticancer activities, especially hormonally derived cancers (1). Genistein is a phytoestrogen, meaning that it binds to estrogen receptors protecting them from harmful circulating estrogen (1). It may also decrease the expression of aromatase and 5-alpha reductase, enzymes attributed with prostate issues (2). As a phytoestrogen, it may also exhibit benefits for menopause, osteoporosis prevention, skin and heart health (3).
Genistein should be taken as recommended by a healthcare professional to assess if appropriate for you.