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 Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration What is GHK Cu and Why is Everyone Talking About It? GHK Cu (Copper Peptide) is a powerful, naturally occurring compound in the body that plays a key role in skin health