Elite sportsmen and women around the world turn to Optimum Nutrition Gold Standard 100 Percent Casein to put their muscles in the ideal possible shape for high-level competition. This slow-digesting shake provides an ideal boost of protein to the regular diet and facilitates the growth and maintenance of muscle mass*.In addition to 680 mg of calcium per serving that supports the normal muscle function*, 0.5 Percent fat and no added sugars, it provides 24 g or premium micellar casein to ensure peak conditioning before and after high-intensity workouts. Optimum Nutrition Gold Standard 100 Percent Casein can be taken as a snack at any point throughout the day right up until bedtime.