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Optimum Nutrition Serious Mass

Optimum Nutrition Serious Mass

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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.

Each great-tasting serving delivers over 1,250 nutrient packed calories built on a foundation of 50 grams of muscle building protein from high-quality sources including Ultrafiltered Whey Protein Concentrate, Calcium Caseinate, and Egg Albumen.

Beyond The Basics and benefits of Serious Mass

  • 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