Optimum Nutrition Serious Mass 2.73kg (6lb)
ON 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 have always wanted!
- 1,250 calories per serving
- 50g of proteins and 250g of carbs per serving to support the growth of lean muscle mass
- No added sugar
- Enjoy between meals &/or post-workout
- Add two heaped scoops
- New users usually start with 1/2 a serving and then gradually increase