The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline 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 WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents Stacking Retatrutide With GHK Cu: Results & What to Expect PDF) GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes