GHK Cu Copper Peptide: The Ultimate Peptide For Longevity GHK Cu (Copper Peptide) GHK Cu Peptide for Hair Growth: Science, Benefits, and How It Works Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 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