Biochem's 100% whey protein contains 100% pure ultra-filtered/micro-filtered (uf/mf) whey protein isolate, the finest quality and most easily assimilated whey protein isolate on the market. the micro-filtration method isolates the natural whey proteins in a highly concentrated form without fat. this process leaves 99% of the peptides undamaged and undenatured. free of artificial hormones including rbst and rbgh 100% whey protein is rich in the highly bioactive fractions glycomacropeptide and beta-lactoglobulin, immunoglobulin, glycopeptides and lactoferrin, plus amino acids that support muscle tissue.