Genistein is an angiogenesis inhibitor and a phytoestrogen and belongs to the category of isoflavones. Genistein was first isolated in 1899 from the dyer's broom, Genista tinctoria. It is found in a number of plants including lupin, fava beans, soybeans, kudzu, and psoralea being the primary food source. It can also be found in the medicinal plants, Flemingia vestita and F. macrophylla, and coffee. It can also be found in Maackia amurensis cell cultures. Besides functioning as antioxidant and anthelmintic, many isoflavones have been shown to interact with animal and human estrogen receptors, causing effects in the body similar to those caused by the hormone estrogen.