It's popular in biohacking circles and often pops up in patient consults, but the FDA hasn't approved it for human therapy
A small copper-binding peptide (Copper Tripeptide-1), naturally present in human plasma which has proven to stimulate hair growth, seal the brittle hair in several ways: GHK-Cu has angiogenic properties, is very important for hair growth, because each follicle receives its essential oxygen and blood from a solitary capillary
Sustained-release formats (Thorne) work best when taken at consistent times
Upregulation of Foxp3 expression in mouse and human Treg is IL-2/STAT5 dependent: implications for the NOD STAT5B mutation in diabetes pathogenesis
Dobin A, Davis CA, Schlesinger F, Drenkow J, Zaleski C, Jha S, et al
Tendon and Ligament Support For bodybuilders, tendons and ligaments are often the weak link