Optimum Nutrition Serious Mass

Optimum Nutrition Serious Mass is ideal for anyone wanting to add some calories into their diet buy physically can’t take any more food.
It is also ideal for anyone who finds it hard to gain weight. These are what we call hard gainers and this is definitely the product for you.
Optimum Serious Mass Shake delivers an amazing 1,250 calories, 50g of blended protein and 250g of Carbohydrate per serving, to help fuel workouts.