GNC MEGA MEN Energy and Metabolism keeps you on the right track for filling your nutritional gaps. Mega Men Energy Metabolism is an enhanced multivitamin that provides the same clinically studied base as our Mega Men formula with ingredients that help boost your energy. It supplies B-vitamins that are essential for energy production and metabolism. Contain a premium blend of antioxidants including selenium, vitamin C and vitamin E to aid in supporting the body's immunity.GNC