GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu G Lab Peptides The growth hormone receptor: mechanism of activation and clinical implications Nature Reviews Endocrinology 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