Casein, a slower digesting and absorbing protein, compared to whey, may be used after exercise, between meals, or before bed to help support satiety and muscle recovery. GOLD STANDARD 100% CASEIN™ can deliver BCAAs to recovering muscles for several hours. By using only premium micellar casein with our high standards —and no artificial flavors, sweeteners or colors— as a protein source, we’ve created a protein powder that sets the GOLD STANDARD® for slow digesting protein support.