The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Poly(ethylene glycol) conjugation to glycyl L histidyl L lysine peptide enhances fibroblast proliferation and wound healing in rats ScienceDirect What is the safe topical dosing, duration, and contraindications for the copperbinding peptide GHKCu for wound healing or antiaging? Five Peptides Every Endurance Athlete Should Understand 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 Frontiers GHK Peptide Inhibits Bleomycin Induced Pulmonary Fibrosis in Mice by Suppressing TGF1 Smad Mediated Epithelial to Mesenchymal Transition