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Serious Mass, Pack of 4

Weight Gainers by Optimum Nutrition

Sold as “Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate, 6 Pound (Packaging May Vary) (Pack of 4)”

Supports 21 goals and 52 benefits, based on 18 supplements and 32,866 published studies.

Servings
16

Supplement Facts

Serving size: 340g (About 2 Scoops) · 16 servings per container

Evidence from published research

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