Glutathione is an important tripeptidethiol (γ-glutamylcysteinyl glycine) antioxidant composted of three amino acids, cysteine, glycine, and glutamate. As an important tripeptidethiol antioxidant widely distributed in biological fluids and tissues of plants, animals, fungi, and some bacteria and archaea, it is associated with many physiological functions, such as the transportation of amino acids, the synthesis of proteins and DNA, the stabilization of cell membranes and the detoxification of xenobiotics.