Whey protein is a high quality protein that is derived from milk. It provides all of the essential amino acids that the body needs to support lean muscle and strength when used with a balanced diet and exercise plan. Pure Protein offers several protein powders that are high in whey protein. Whey protein can also be found in Pure Protein bars as well as shakes. Many of the shakes provide milk protein, which is a natural source of whey as well as casein – the two major protein components of milk. Many people feel whey protein is one of the best supplemental proteins, if not the best, due to its amino acid profile and other factors used to rank protein quality such as Biological Value and Protein Digestibility.