Glutathione (GSH) functions as a cofactor for several antioxidant enzymes. It is involved in the regeneration of vitamins C and E. It modulates cellular proliferation and apoptosis. GSH is crucial for mitochondrial functioning and the maintenance of mitochondrial DNA (mtDNA). Mutations in this gene are associated with Alzheimerμs, Parkinsonμs and Huntingtonμs diseases. It is also linked to cystic fibrosis, immune diseases and cardiovascular diseases.', 'Reduced glutathione (GSH), a tripeptide (g-glutamyl-cysteinylglycine), is the major free thiol in most living cells and is involved in many biological processes such as detoxification of xenobiotics, removal of hydroperoxides, and maintenance of the oxidation state of protein sulfhydryls. It is the key antioxidant in animal tissues