Optimum Nutrition Serious Mass Weight Gainer Protein Powder is the ultimate muscle building and weight gan formula. This Chocolate-flavored protein powder delivers 1,260 calories per 2-scoop serving along with 50 grams of protein to support muscle recovery and 251 grams of carbohydrates to help workouts. With 25 vitamins and essential minerals, including Vitamin C and Vitamin D, Optimum Nutrition Serious Mass Protein Powder makes the ideal post-workout and between meal shake for sizing up your weight management goals. Optimum Nutrition powder mixes easily using a shaker cup or blended in a smoothie. There are 4 servings in this 3 pound container.