Glutathione as a skin whitening agent: Facts, myths, evidence and controversies Indian Journal of Dermatology, Venereology and Leprology The Emerging Roles of Glutamyl Peptides Produced by Glutamyltransferase and the Glutathione Synthesis System Gamma glutamyltransferase of Cancer Cells at the Crossroads of Tumor Progression, Drug Resistance and Drug Targeting Anticancer Research How to Use Glutathione Serum for Radiant, Even Toned Skin? Gamma glutamyl transferase (GGT), Glutamyl Transpeptidase