Optimum Nutrition Serious Mass

Size is an advantage in many sports, but some athletes have a hard time gaining weight. You can only eat so much food. Serious Mass is the ultimate in weight gain formulas, with 1250 calories per serving and 50 grams of protein to support muscle growth and repair.

This instantised ...Size is an advantage in many sports, but some athletes have a hard time gaining weight. You can only eat so much food. Serious Mass is the ultimate in weight gain formulas, with 1250 calories per serving and 50 grams of protein to support muscle growth and repair.

This instantised powder makes the ideal post work-out and between meals shake for sizing up your goals. Serious Mass provides you with the tools you need to pack on the pounds and when coupled with serious weight room effort – develop your physique to the fullest.