After prolonged physical exertion, glutathione neutralizes reactive oxygen species (ROS) produced during the Krebs cycle, effectively preventing the lipid peroxidation of mitochondrial membranes and allowing them to recover and maintain efficient ATP production without suffering from premature fatigue or permanent oxidative damage.
Butterworth CE Jr, Tamura T
"Antioxidant mechanisms of glutathione in skin protection: From molecular pathways to clinical applications." Free Radical Biology and Medicine, 168, 187-202.
Most are not FDA-approved for human use, some exist only through a prescription or compounding pharmacy tied to a different condition, and the rest are sold exclusively as unregulated "research chemicals" not intended for human consumption
National Library of Medicine Medical Subject Headings (MeSH) EC 2.5.1.18 Glutathione Vs Vitamic C Preparation of GST Fusion Proteins How Does Glutathione Work GST Gene Fusion System Handbook Archived 2008-12-05 at the Wayback Machine