Injectable GHK Cu: Beginner's Guide to Copper Peptide GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link GHK Cu is one of the most talked about peptides for a reason. Known for its role in skin regeneration, collagen production, and hair support, this copper peptide helps your body do what How GHK Peptide Works Signaling GHK acts as a switch for skin repair: Interacts with adenosine receptors reduces inflammation Activates MAPK ERK, PI3K Akt, TGF pathways Stimulates fibroblasts & keratinocytes boosts collagen, elastin