GHK Cu HGH & Peptides Deus Medical Subcutaneous Injection Sites and Instructions for Safe Self Administration What are the differences between topical and intravenous (IV) administration of Glycyl Histidyl Lysine Copper (GHK Cu) for skin health and wound healing in patients? 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