WHEY PROTEIN is a 100% natural protein concentrate of whey and is specially ultrafiltered under low temperature to be low in fat, lactose and carbohydrates. WHEY PROTEIN is a rich source of glutamine-rich biologically active proteins. Fifty-one percent of the proteins found in whey are from BLG (Beta-Lactoglobulin), 20% of whey is ALB (Alpha-Lactalbumin), 10% Immunoglobulin, 10% Albumin, and 7% minor fractions(Beta-Microglobulin, lactoferrin, lactoperoxidase, lysozyme, lactolin and relaxin). Albumin is of particular interestto researchers because of its elevated concentrations of glutamylcysteine, a precursor to the antioxidant glutathione.