Casein is a slow-absorbing protein – calcium caseinate and micellar casein – which provides your muscles with nutrients in the long-term. It is derived from milk that breaks down more slowly in the digestive system which increases satiety and provides a slower release of muscle-building amino acids. Blade Casein delivers 24g of high-quality protein taken from multiple casein sources. It is an excellent choice before going to bed or during physical activity because the digestion of casein-based proteins can take up to 8 hours. If you want to build muscle or avoid muscle protein breakdown in between meals or during sleep, Blade Casein is an excellent protein choice.