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Optimum Nutrition Serious Mass 5.4kg. Features1250 Calories per serving in water1640 Calories when made with low fat milk Over 250 g of carbohydrates

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Achieve your weight gain goals with Optimum Nutrition Serious Mass. This weight gain protein powder supplement is the ultimate weight gainer formula. With 1,250 calories per serving and 50 grams of protein for muscle recovery support, this instantized powder makes the ideal post-workout recovery drink. You can also shake up a drink between meals. Serious Mass provides you with the tools you need to pack on the pounds and help you develop the physique you've always wanted.

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