Optimum Nutrition Serious Mass
High-Calorie Mass Gainer
Optimum Nutrition Serious Mass helps athletes and hard gainers increase muscle size and overall weight. Its high-calorie formula provides protein, carbohydrates, and nutrients for fast and effective muscle growth.
Supports Muscle Recovery
This gainer delivers premium whey protein to repair and build lean muscle after hard workouts. Quick-digesting protein provides essential amino acids for faster recovery. Complex carbohydrates replenish energy and glycogen stores so your body can perform at its best.
Boosts Strength and Performance
Serious Mass includes healthy fats, vitamins, and minerals to support overall health. Added creatine helps improve strength, endurance, and workout results. Plus, the formula gives the calories you need without unnecessary sugar or fillers.
Easy to Mix and Delicious
The powder blends smoothly and tastes great. Take it post-workout or as a convenient meal replacement. Whether you are bulking or recovering from training, it helps you reach your daily calorie and protein goals.
Achieve Lean Mass Efficiently
Together, protein, carbs, and nutrients work to increase size, strength, and recovery. For anyone looking to gain lean mass and improve performance, Optimum Nutrition Serious Mass is an all-in-one solution.

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