Optimum Nutrition | Serious Mass Gainer 12Ib nosync Perfect for athletes

Perfect for athletes

Fat burn that is

stands out on it's own and in a class of it's own

promotes a healthy gut

was designed for the hardcore user to give you the best Muscle Pump of your life

Optimum Nutrition | Serious Mass Gainer 12Ib nosync Perfect for athletesSerious Mass is the ultimate in weight gain formulas providing you with the tools you need to pack on the pounds and develop the physique you've always wanted. Each serving of Serious Mass contains 1250 calories derived primarily from protein sparing complex carbohydrates and a high quality protein blend consisting of Whey Protein Concentrate, Calcium Caseinate, and Egg albumen. Creatine Monohydrate, Glutamine, Choline, and Inositol have been added to