GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link 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? Middle aged mice treated with GHK Cu peptide administered intraperitoneally or intranasally show behavioral rescue but divergent hippocampal aging programs bioRxiv Copper tripeptide