It will also boost your energy with natural ingredients like L-arginine and L-citrulline, in order better circulation all the way through the body, acai berry for more energy, beta-alanine increases energy and stop muscle fatigue and zinc contributes to muscle repair and growth. Comes after Muscle Rev X is an increase in power in advance, plus a fat burner. It also gives you the sound as it tightens the muscles as they grow. This exclusive formula helps accelerate the growth of muscles.