A Dietary Supplement 60 Vegetarian Capsules. The body requires protein to build muscle and other tissues, and to produce essential compounds such as hormones and enzymes. Therefore, they are vital for proper functioning of all physiological systems, including the nervous, musculo-skeletal, endocrine and immune systems. Some have suggested that increased protein synthesis follows prolonged exercise. Athletes competing in body building or endurance sport may require significantly more protein that the normal requirement. Vitamin E is one of the body’s most important antioxidant nutrients, protecting healthy cells from oxidative and free radical damage. Free radicals are unstable chemicals formed in the body during metabolism and from exposure to environmental pollutants. When an excessive number of free radicals are formed, they can degrade the structure and function of healthy cellular components, especially membrane lipids, proteins, and nucleic acids. Maca has been used for years in South America and is currently gaining attention in the United States. It is used as a general tonic and has significant energy, stamina, and endurance enhancing properties. The leaves of the Damiana shrub (Turnera diffusa) were traditionally used as an aphrodisiac by the Mayan Indians of Central America. Although used as a restorative herb for women’s reproductive functions, damiana has been principally seen as an herb for treatment of male impotence. Native to the Brazilian rainforests, the tree Muira puama (potency wood) has been used by Amazonian Indians as a nerve tonic and aphrodisiac. Horny Goat Weed has been used traditionally to support sexual health and well-being.