American WHEY PROTEIN, made fresh in Wisconsin, is 100% natural and specially ultrafiltered under low temperature to be low in fat, lactose and carbohydrates. American WHEY PROTEIN is a rich source of glutamine and biologically active proteins. Fifty-one per cent of the proteins found in whey are from BLG (Beta-Lactoglobulin), 20% of whey is ALG (Alpha-Lactalbumin), 10% Immunoglobulin, 10% Albumin and 7% minor fractions (Beta-Microglobulin, lactoferrin, lactoperoxidase, lysozyme, lactollin and relaxin), Albumin is of particular interest to researchers because of its elevated concentrations of glutamylcysteine, a precursor to the antioxidant glutathione. American WHEY PROTEIN is the richest natural source of BCAAs (Isoleucine, Leucine and Valine), important components of muscle tissue. BCAAs are depleted from muscle tissue following strenuous exercise, which can cause catabolic loss of muscle tissue. BCAAs suppress proteolysis (muscle loss).