Optimum Nutrition Serious Mass is a premium high-calorie weight-gain formula designed for anyone who struggles to put on size and strength through food alone. Packed with a powerful blend of calories, carbohydrates, proteins, vitamins, and minerals, it delivers the nutritional support needed to fuel muscle growth and recovery.
Each serving provides a massive dose of nutrients to help you reach a calorie surplus—the key to gaining weight. Whether you’re a hard-gainer, an athlete in a bulking phase, or someone looking to increase lean mass, Serious Mass makes hitting your daily calorie and protein goals easier and more convenient.KEY
KEY BENEFITS
High-Calorie Formula: Helps you achieve the surplus needed for weight and muscle gain.
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High-Quality Protein Blend: Supports muscle growth, repair, and recovery.
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Complex Carbohydrates: Provides sustained energy for intense workouts.
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Added Vitamins & Minerals: Helps support overall health during muscle-building phases.
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Easy-to-Mix Powder: Great taste and smooth consistency—perfect in water or milk.
IDEAL FOR
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Hard gainers who struggle to gain weight
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Athletes and lifters in a bulking phase
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Anyone needing convenient, calorie-dense nutrition
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Post-workout recovery or between-meal calorie boosts
Optimum Nutrition Serious Mass gives you the fuel your body needs to grow stronger, heavier, and more muscular—one shake at a time.
- Availability: 10 In Stock