Glutathione Redox Control of Asthma: From Molecular Mechanisms to Therapeutic Opportunities Anne M. Fitzpatrick, Dean P. Jones, Lou Ann S. Brown, 2012 GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? Frontiers The strategic breakdown: CHAC enzymes as regulators of glutathione homeostasis and disease implications Fig. 4. GHK Cu Hair Growth TJ. Glutathione peroxidase is an important enzyme in cellular antioxidant defense systems, detoxifying peroxides and hydroperoxides. As a component of the glutathione cycle, it protects the liver from reactive oxygen metabolites. Selenocysteine