Gen-Tec Nutrition's Ultimate Male Fuel contains high-quality herbs sourced from India including Tribulus Terrestris which now contains 80 percent Saponins equivalent to 10 percent Protodioscin. Tribulus Terrestris and Epimedium Sagittatum (Horny Goat Weed) are traditional Chinese herbal medicines which have been used for many years to help libido and support male sexual stamina and endurance. Serenoa Serrulata (Saw Palmetto) may assist in the management of medically diagnosed benign prostatic hypertrophy. These three herbs which help support physiological functions of the male body have been combined with zinc, magnesium and vitamin B6.