whey, a liquid by-produc is widely accepted to contain many valuable constituents These include especially proteins that possess important nutritional and biological properties- particularly with regard promotion of health, as well as prevention of diseases and he to conditions. Antimicrobial and antiviral actions, immune system stimulation. anticarcinogenic activity and other metabolic features have indeed been associated with such whey proteins, as lactoperoxidase, and bovine serum albumin. The acto ferrin acto globulin a-lactalbumin most important advances reported to date pertaining to biological properties of whey proteins are reviewed in this communication