Casein protein or any famous egg white proteins on the market. 2. Collagen is a useful protein that is not discovered at the cabinets in grocery stores. Three. Collagen is the maximum ample protein to your frame's' composition, and it promotes: * healthy skin and hair care. * decreases joint ache. *controls gut leaks. * muscle tissues. * strengthens nails, teeth and nails. * is high-quality for the liver, and * improves