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The Ultimate High-Calorie Formula for Serious Muscle Gains
If you have a fast metabolism or find it difficult to consume enough quality calories through whole foods alone, Optimum Nutrition Serious Mass is the ultimate solution. Designed specifically for "hardgainers" and athletes in a heavy bulking phase, this nutrient-dense weight gainer provides the heavy-duty support you need to increase your size, strength, and overall mass.
Massive Calories and Multi-Phase Nutrition
Packing on pounds requires a consistent caloric surplus. Every serving of Serious Mass delivers a powerhouse of 1,250 calories and 50g of a premium protein blend to fuel muscle growth and repair. With over 250g of carbohydrates and no added sugar, this formula provides the sustained energy necessary to power through intense workouts and fully replenish glycogen stores after a grueling session.
Comprehensive Support for Immunity and Performance
Serious Mass goes beyond simple calories by prioritizing your overall health and performance. It is fortified with 25 essential vitamins and minerals, including Vitamin C, Vitamin D, and Zinc, to provide vital immune support—crucial when you are pushing your body to the limit. Additionally, the inclusion of Creatine Monohydrate and Glutamine helps support muscle strength, power output, and faster post-workout recovery.
100% Authentic
Fast Shipping
14-Day Returns
The Ultimate High-Calorie Formula for Serious Muscle Gains
If you have a fast metabolism or find it difficult to consume enough quality calories through whole foods alone, Optimum Nutrition Serious Mass is the ultimate solution. Designed specifically for "hardgainers" and athletes in a heavy bulking phase, this nutrient-dense weight gainer provides the heavy-duty support you need to increase your size, strength, and overall mass.
Massive Calories and Multi-Phase Nutrition
Packing on pounds requires a consistent caloric surplus. Every serving of Serious Mass delivers a powerhouse of 1,250 calories and 50g of a premium protein blend to fuel muscle growth and repair. With over 250g of carbohydrates and no added sugar, this formula provides the sustained energy necessary to power through intense workouts and fully replenish glycogen stores after a grueling session.
Comprehensive Support for Immunity and Performance
Serious Mass goes beyond simple calories by prioritizing your overall health and performance. It is fortified with 25 essential vitamins and minerals, including Vitamin C, Vitamin D, and Zinc, to provide vital immune support—crucial when you are pushing your body to the limit. Additionally, the inclusion of Creatine Monohydrate and Glutamine helps support muscle strength, power output, and faster post-workout recovery.