Epimedium, also known as Horny Goat Weed, or Yin Yang Huo, is a genus of about 60 or more species of herbaceous flowering plants in the family Berberidaceae. The large majority are endemic to southern China, with further outposts in Europe, and central, southern and eastern Asia.

Horny Goat Weed has 2,000 years to used as a male function enhancer in China.Many culturhat horny goat weed supports libido, erectile function, and helps to relieve menopausal discomfort. Oneingredient, maca, is reported to support erectile problems, for men and women with low libido, and for women undergoing menopause.