Optimum Nutrition Serious Mass – Vanilla (12 lb / 5.6 kg)

Optimum Nutrition Serious Mass – Vanilla (12 lb / 5.6 kg) is the ultimate high-calorie gainer for athletes and hard gainers aiming for extreme size. Each serving delivers more than 1,200 calories, 50g of protein from whey, casein, and egg, and complex carbs for long-lasting energy. Enriched with creatine, vitamins, and minerals, it provides complete nutritional support to fuel workouts and recovery. The smooth Vanilla flavor mixes easily and pairs well with fruits or nut butters for added calories. With 12 lbs per bag, it offers excellent value and a long-term solution for consistent bulking. Serious Mass is designed to help you stay in a surplus, replenish glycogen, and accelerate muscle growth. Trusted worldwide, it supports endurance, recovery, and strength gains. For athletes dedicated to serious bulking, this mass gainer ensures your body has the fuel it needs to maximize results and achieve peak performance consistently.