Gold Standard 100% Casein from Optimum Nutrition is a slow-digesting micellar casein protein, ideal for improving muscle recovery while you sleep. Each serving provides 24 g of protein and 4.9 g of natural BCAAs, suitable for consumption between meals or before bedtime. This ensures a slow and steady supply of essential amino acids to the muscles. This product is available in a 1.8 kg container and comes in various flavors, with slight differences in composition. To use, mix 1 heaping scoop with 240-350 ml of water, milk, or another beverage and shake well. The product is ideal for those looking to maximize protein synthesis during periods when the body normally receives fewer nutrients.