Turn to Optimum Nutrition Serious Mass, Vanilla, 6 lb, for a serious weight gain formula. It fuels extreme workouts and helps replenish glycogen stores. To aid and support muscle recovery, it has 50 grams of protein and 1,250 calories per serving. Optimum serious mass makes it quick, simple and delicious to add calories to your healthy fitness regimen. This delicious vanilla protein powder makes the ideal snack between meals and post-workout for sizing up your goals. Enjoy it before bed to provide nutrients to recovering muscles while you sleep. For a scrumptious and nutritious supplement, blend Serious Mass high protein with low-fat dairy milk, nut milk or water. This balanced mix contains 250 grams of carbohydrates per serving.