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Optimum Nutrition Serious Mass is a high-calorie mass gainer designed for individuals who struggle to gain weight and muscle. It delivers a powerful blend of protein, carbohydrates, and calories to support rapid size and strength gains.
Key Benefits: Extremely high calorie formula (approx. 1,267 calories per serving) to support weight gain Provides 50g of protein per serving to help build and maintain muscle 254g of carbohydrates to fuel workouts and recovery Supports muscle growth, strength, and post-workout recovery Includes added vitamins and minerals for overall nutrition Ideal for hard gainers, bulking phases, and high-calorie needs