Optimum Nutrition Serious Mass Weight Gainer Protein Powder is the ultimate muscle building and weight gain formula. This vanilla-flavored protein powder delivers 1,260 calories per 2-scoop serving along with 50 grams of protein to support muscle recovery and 253 grams of carbohydrates to help fuel 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 gain goals. Optimum Nutrition powder mixes easily using a shaker cup or blended in a smoothie. There are 4 servings in this 3 pound container. There’s more of you in you. Optimum Nutrition has been trusted to provide high quality in post-workout recovery, pre-workout energy, and on-the-go sports nutrition for over 35 years and in 90+ countries.