Medisys double mass gainer is a unique blend of balanced carbohydrates and proteins fortified with essential vitamins and minerals that relieves the muscle fatigue after exercise. Medisys double mass gainer contains fast digesting whey protein which is rich in amino acids that gets easily absorbed in your muscles and fuels for muscle recovery . On the other hand, casein protein which is absorbed slowly helps in his formation of new muscle tissues. Whey and casein protein together helps to achieve lean and toned muscle build.