l glutathione tripeptides 3 (a) The tripeptide acts as a cofactor in various Glutathione | C10H17N3O6S | CID
Description
2008;25:E2
Just because its not FDA approved doesnt mean that they cant prescribe it and we are well aware that more and more functional medicine physicians and orthopedic surgeons have been experimenting with the various peptides with their patients

Foods rich in these minerals including chicken, beef, and fish can help to boost levels of GSH and glutathione peroxidase
eLife 2 , e01402 (2013)
