glutathione persulfide chemical structure of two isoforms of (GSH and GSSG) Emerging Chemical Biology of Protein

In 24-month-old mice subjected to muscle injury, 5-Amino-1MQ treatment increased satellite cell proliferation and myofiber cross-sectional area approximately 2-fold compared with vehicle controls

[DOI] [PMC free article] [PubMed] [Google Scholar] 13.Ookhtens M., Kaplowitz N

Radiation therapy is an effective modality in the treatment of mantle cell lymphoma, even in heavily pretreated patients

PLoS ONE 7 , e34169 (2012)

Copper toxicity from GHK-Cu is unlikely unless doses exceed 1520mg daily for extended periods or if the subject has pre-existing copper metabolism disorders (Wilsons disease, Indian childhood cirrhosis)

While your body can use those amino acids to build new glutathione, the process is inefficient