Huh the more ya know lol.

Horny goat weed refers to various herb species of the Epimedium genus, and may be known as "yin yang huo." It has limited evidence of health benefits.

Horny goat weed contains chemicals that might help increase blood flow and improve sexual function. It also contains phytoestrogens, chemicals that act somewhat like the hormone estrogen.

People use horny goat weed for erectile dysfunction (ED), sexual problems, weak and brittle bones, health problems after menopause, and other conditions, but there is no good scientific evidence to support any of these uses.