Build real size, strength, and stamina with Optimum Nutrition’s all-in-one bulk-gaining powerhouse.
Serious Mass is a high-calorie weight gainer with over 1,200 calories, 50 g of protein, and important nutrients per serving. It promotes muscle building and recuperation for hard gainers.
Optimum Nutrition Micronized Creatine Monohydrate provides 5 g of pure creatine per serving for increased strength, performance, and explosive workouts.
Free Shaker. Included
The shaker bottle is convenient and robust, allowing for smooth mixing and easy supplement use anywhere, at any time.
Ideal for bulking, muscle building, and maximum strength improvements.
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