DHEA is the most abundant hormone in our bodies and it plays a critical role in many different functions. Our DHEA levels peak in the second or third decade of our lives and then it begins to decline. Roughly one-half of DHEA is lost in men by age 40. Reduced levels of DHEA trigger reduced amounts of androstenedione, testosterone and other steroid hormone metabolites. Therefore, DHEA is an important supplement for exercise and fitness enthusiasts. Ultimate Nutrition 100% DHEA Supplements build up the adrenal gland, strengthen your immune system, slows the aging process, provides more energy, improves your mood & memory, and builds up bone and muscle strength.