Mutant Mass is all about gaining rock hard muscle – and lots of it! Building muscle requires the right protein mix to expand the muscle tissue and repair it fast. The protein must also be spared from being wasted for the body’s energy needs, while the muscle also requires massive infusions of clean calories to replace glycogen used up during training. With over 1,000 calories per serving, just one serving per day can go along way in the quest for mass. For severe ectomorphs / hardgainers, with rapid metabolisms, 1 and a 1/2 to 2 servings may be necessary; but it all relates back to individual nutrition. PVL Mutant Mass was designed with only hard working athletes in mind. It will increase power, size and all out strength.