Optimum Nutrition Serious Mass (Chocolate 6 lb) is a balanced weight gain formula. It has 1,250 calories per serving and 50 grams of protein for muscle recovery support. It fuels intense workouts and aids in the replenishment of glycogen stores. It makes adding calories to your healthy fitness regimen quick, simple and delicious. This instant Optimum serious mass chocolate powder makes the ideal post-workout shake or snack between meals for sizing up your goals. You can also drink it before bed to provide nutrients to recovering muscles while you sleep. Blend Serious Mass protein with low-fat dairy milk, nut milk or water, for a nutritious and scrumptious supplement. It contains 25 vitamins and minerals, 250 grams of carbohydrates and no added sugar. Optimum Nutrition Serious Mass (Chocolate, 6 lb) protein provides you with the tools you need to pack on the pounds and help you develop your desired physique.