Serious Mass 2.73 kg Optimum Nutrition Power System high-quality source of protein that

high-quality source of protein that is high in muscle-building amino acids and low in carbohydrates and fats - 0 grams of each serving

best beef protein gives you plenty of ways to keep workout recovery tasty and enjoyable

delay fatigue and help spare muscle fibers for increased strength gains

Amount Per Serving:

Serious Mass 2.73 kg Optimum Nutrition Power System high-quality source of protein thatSerious Mass Optimum Nutrition Serious Mass is the ultimate in weight gain formulas. Serious Mass supplies 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 serious 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,