- the ultimate weight gain formula.
- add serious mass with 1,250 quality calories per shake.
- support muscle growth with 50g of proteins and 250g of carbs per serving.
- enjoy between meals, post-workout and/or before bed.
Optimum nutrition's serious mass is the ultimate weight gain formula. If you find it difficult to gain weight, serious mass will help you develop the physique you've always wanted!
Each delicious shake delivers an incredible 1,250 calories, but no added sugar. This includes 50g of blended protein to support muscle growth and 250g of carbohydrates. Supports growth of lean muscle mass