Gamma Glutamyl Transferase (GGT) is an enzyme found in various tissues throughout the body, with the highest concentrations in the liver. It plays a critical role in the gamma-glutamyl cycle, which is essential for the synthesis and degradation of glutathione, a major antioxidant. GGT's activity is primarily associated with the transfer of gamma-glutamyl functional groups from molecules such as glutathione to an acceptor, which could be an amino acid, peptide, or water.
