Supports Muscle Building & Weight Gain Goals. 1,250 Calories Helps Boost Calorie Intake. 50g Protein Helps Build and Maintain Muscle. 253g Carbs Helps Fuel Intense Workouts. Banned Substance Tested. Why Optimum Nutrition Serious Mass? Calories That CountSerious weight gain goals require serious calories. Unfortunately, those who need the extra calories most often have a hard time consuming enough of them. For many aspiring to be bigger, a highly- active metabolism, weaker appetite and on-the-run lifestyle can make it a real challenge to get enough calories from food. With 1,250 calories and 50 grams of protein per serving, youve got lots to gain from ONs Serious Mass. Get serious about your sizable ambitions with Serious Mass. Supercharge Your Serious MassUsing an electric blender, you can add nuts, fresh or frozen fruits and other calorie-contributing ingredient to enhance the weight gain and muscle recovery potential of Serious Mass. With less than 5 grams of fat per serving, Serious Mass is the weight gain formula packed with calories that count during recovery. Optimal Usage OccasionsBetween meals, after weight training and before bed. Optimum Nutrition Serious MassSerious Mass is the ultimate in weight gain formulas. With 1,250 calories per serving and 50 grams of protein for muscle recovery support, this instantized powder makes the ideal post-workout and between meals shake for sizing up your goals. Serious Mass provides you with the tools you need to pack on the pounds and help you develop the physique youve always wanted. 1,250 Calories. 50 Grams of Blended Protein. 254 Grams of Carbohydrates. 3g Creatine, 500mg Glutamine, and Glutamic Acid. 25 Vitamins and Essential Minerals