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 Introduction GHK Cu is a copper peptide complex formed from the tripeptide glycyl L histidyl L lysine bound to copper. This compound has garnered significant attention in both laboratory and formulation research due to its critical role Figure 3 from GHK Copper Peptide in Skin Remodeling and Anti Aging ! GHK Cu in Skin Remodeling Semantic Scholar 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper