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Optimum Nutrition Serious Mass

Serious Mass: 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.

Beyond The Basics

• Adding Calories Has Never Been This Easy or Tasted So Good
• 1,250 CALORIES
• 50 g of BLENDED PROTEIN
• Over 250 g of Carbohydrates with NO ADDED SUGAR
• Enhanced with Creatine, Glutamine, and Glutamine Peptides
• 25 Vitamins and Essential Minerals