Description
Optimum Nutrition Serious Mass is one of the most powerful and widely trusted mass gainers in the fitness industry, specially formulated for individuals who struggle to gain weight and muscle mass. This advanced formula delivers an extremely high-calorie blend of protein, carbohydrates, and performance-enhancing nutrients to help you achieve a calorie surplus and build serious size.
Each full serving provides up to 1250–1260 calories, making it ideal for bulking phases or individuals with high metabolic rates. It includes 50g of high-quality protein, sourced primarily from whey protein concentrate, which supports muscle repair, recovery, and growth after intense workouts.
In addition to protein, Serious Mass delivers 250+ grams of carbohydrates, which help fuel workouts, replenish glycogen stores, and promote faster recovery. The formula is further enhanced with 5g of creatine monohydrate, supporting increased strength, endurance, and power output during training sessions.
To support overall health, it also includes 19 essential vitamins and minerals, along with naturally occurring glutamine and BCAAs that aid muscle recovery and immune function.
This mass gainer is ideal for beginners, hard gainers, and athletes who find it difficult to consume enough calories through food alone. It can be used post-workout or between meals to consistently meet daily calorie and protein requirements.
