isoflavone

noun

1. Any of a class of polyphenolic phytoestrogens found in soybeans and similar plants that may have beneficial health properties.

   “The presence of isoflavones has also led to the worry that soy might negatively affect fertility or give men more feminine characteristics. […] And while it’s true that the isoflavones in soy can weakly mimic estrogen, he added, they also seem to have anticancer, anti-inflammatory and antioxidant properties.”