Glutathione (GSH), also named Reduced Glutathione, is a tripeptide composed of glutamate, cysteine, and glycine. It can be found in almost every cell of human body. Nowadays, the industrial production of Glutathione is mainly obtained by enzymatic synthesis. It has biological activities such as detoxification, anti-oxidation, free radical scavenging, skin-whitening and spot-fading. Therefore, it is widely used in cosmetics, medicine, health care products and other industries.