MAMMOTH MASS Weight Gainer provides more protein, better carbs and far less sugar giving you more of what you want in a potent mass muscle building formula. With 60 grams of the finest whey protein isolate, whey protein concentrate, micellar casein and calcium caseinate available, and formulated with powerful combinations of creatine, glutamine and MAMMOTH amounts of Amino Acids, it will have you primed for every experience of MAMMOTH proportions both in and out of the gym.