Optimum Nutrition 100% Gold Standard Casein is a slow digesting protein powder. Casein supports recovery & aids muscle growth with delayed release which is more beneficial throughout the remainder of the day. Product Features Enjoy before bed to optimise muscle re-building Each shake contains 24 grams of pure micellar casein, & just 0.5 grams of fat Supports & aids muscle growth Weighs 2 pounds & contains 26 servings Chocolate supreme flavour Sometimes slower is better, size ONE SIZE