OPTIMUM NUTRITION Serious Mass powder supports muscle building, weight gain, and helps fuel workouts with up to 1260 calories, 50g of protein, up to 253g of carbohydrates, and 5g of creatine monohydrate in every serving all in a convenient shake for easy consumption. This value-priced bundle contains two 12lb. tubs and allows you to choose two of 5 great tasting flavors.

• Supports muscle building & weight gain
• Helps fuel intense workouts
• Two 12lb tubs of Serious Mass powder
• 1250-1260 calories per serving
• 50g protein per serving
• 250-253 carbs per serving
• 5g of creatine monohydrate per serving