Serious Mass
  • 1,250 Calories
  • 50g Blended protein
  • Over 250g Carbohydrates

Optimum Nutrition Serious Mass is the ultimate muscle building and weight gain formula. With 1,250 calories per serving and 50 grams of protein, this instantized powder makes the ideal post-workout and between meals shake for sizing up your goals. Optimum Nutrition Serious Mass provides you with the formula you need to pack on the pounds and, when coupled with serious weight room effort, develop your physique to the fullest.

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