Optimum Nutrition’s Serious Mass is a high-calorie supplement designed to help hardgainers build muscle and achieve a calorie surplus.
Health & Fitness Benefits
High-Calorie Count: Delivers up to 1,250 calories per serving to help you consume more energy than you burn.
Protein for Muscle Growth: Contains 50 grams of fast digesting protein per serving to support muscle recovery and repair.
Carbohydrate Replenishment: Provides over 250 grams of carbohydrates to fuel tough workouts and refill glycogen stores.
Performance Boosters: Includes added creatine monohydrate to improve strength and high intensity exercise performance.
Vitamins and Minerals: Offers a blend of 24 to 25 essential vitamins and minerals to support overall health and metabolic function.














