Horny Goat Express liquid extract is made from Epimedium grandiflorum, a powerful Chinese tonic herb whose first recorded use dates back to the ancient text, Shen Non Ben Cao Jing (ca. 200 B.C.-100 A.D.) were was it described as a warming herb that benefitted jing (semen or life essence). It has been traditionally used for kidney & adrenal support, for male endocrine function, erectile support and enhancement of libido in men and women.