There isnt any published evidence supporting that it is a gut peptide.
Introduction If you have worked incredibly hard to lose a significant amount of weight, you deserve an immense amount of credit
Collagen and Extracellular Matrix Synthesis: GHK-Cu stimulates the production of collagen types I, III, and V by fibroblasts
It also helps improve appetite and increase physical stamina
[DOI] [PMC free article] [PubMed] [Google Scholar] 195.Gojkovic S., Krezic I., Vrdoljak B., Malekinusic D., Barisic I., Petrovic A., Horvat Pavlov K., Kolovrat M., Duzel A., Knezevic M., et al
Related reading on Bonza Health: References The studies cited here are available through PubMed and the publishers' websites