Tribulus Extreme blends the power of tribulus with other complementary herbs to create a product that targets male performance and endurance.* Tribulus has a long history of use by men to promote strength and vitality, and modern research indicates that it may help to promote normal endocrine function and male sexual health.* Combined with maca and other traditional herbs, this formula is designed to promote optimal stamina and energy levels and to support a healthy libido and male sexual function.* If you are a competitive athlete who is regularly tested, please check with your sanctioning body for the status of tribulus. Natural color variation may occur in this product.