Optimum Nutrition Serious Mass 12LB

$52.99 $87.49
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HIGH-CALORIE WEIGHT GAINER
Serious Mass is the ultimate in weight gain formulas. With 1,250 calories per serving and 50 grams of protein for muscle recovery, this instantized powder makes the ideal post-workout and between meals shake for sizing up your goals. Serious Mass provides you with the tools you need to pack on the pounds and help you develop the physique youve always wanted.