Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms Schematic diagram showing the proposed mechanisms underlying the Download Scientific Diagram Copper Peptides for Skin: What GHK Cu Does and How It Compares to Retinol GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link