Optimum Nutrition 100% Casein Gold Standard Protein

Optimum Nutrition 100% Casein Gold Standard Protein is a slow digesting, premium micellar casein protein. Faster digesting protein is desirable immediately before and after exercise to help refuel recovering muscles, but slow digestion and absorption may be more beneficial at other times including bedtime when your body typically goes for hours without food. Optimum Nutrition 100% Casein Gold Standard Protein delivers BCAAs to recovering muscles for several hours.