There are two main hormones in both men and women: testosterone and estrogen. Testosterone is a male hormone and estrogen is a female one. But besides that, estrogen is a signal to the pituitary gland in the brain. Depending on estrogen levels, the pituitary turns on or off testosterone production, and the higher the estrogen levels, the lower the amounts of testosterone will be produced. Chrysin is a type of isoflavone molecule that reduces estrogen levels by cutting down on its conversion from testosterone.