Gamma Oryzanol is a naturally occurring mixture of plant chemicals called sterols and ferulic acid esters. Some evidence suggests that gamma oryzanol increases testosterone levels, stimulates the release of endorphins (pain-relieving substances made in the body), and promotes the growth of lean muscle tissue.
Gamma oryzanol is a natural component of rice bran, corn, and barley oils. Gamma oryzanol is also a available as a supplement. Much of the human research with gamma oryzanol used 300 mg per day.