Whey Protein Isolate is a dietary supplement and food ingredient created by separating components from whey. Whey is the milk by-product of the cheese-making process. It undergoes several processing steps to increase its protein content, reduce the fat and carbohydrate content of whey. Whey isolate also has lower lactose. WPI contains a complete branched-chain amino acid, which is absorbed quickly and numerous studies show that it can help you increase strength, gain muscle, and lose significant amounts of body fat. The application includes nutritional bars, sports performance powders, beverages, dairy products, extruded snacks, and cereals.