Vitality For Men is a combination of herbs and nutrients provided in the ideal dosages to optimize hormonal health in men. None of the ingredients are known to have undesirable side effects when used as directed. Arginine is known to reduce blood pressure in some people and caution should be observed when using this product in combination with anti-hypertensive medication. Three capsules provide: L-Arginine (1200 mg), DHEA (25 mg), MACA 4:1 Extract (750 mg) and Horny goat weed extract (500 mg). 90 Vcaps per bottle.