ON Serious Mass 12LB 1250-Calorie Mass Gainer

ON Serious Mass 12LB Vanilla 1250 High-Calorie Gainer

Optimum Nutrition Serious Mass, Vanilla, 12LB is the ultimate high-calorie formula designed for individuals who struggle to gain weight or build muscle size. With each serving packed with 1,250 calories, 50 grams of protein, and a precise blend of carbohydrates, vitamins, and minerals, it provides everything your body needs to achieve serious muscle growth.

This premium gainer from Optimum Nutrition (ON) is ideal for hard gainers who need extra calories to meet their daily nutrition goals. Its creamy vanilla flavor and smooth mixability make it a convenient and delicious way to fuel your mass-building journey.