GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy 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? Subcutaneous Injection Sites and Instructions for Safe Self Administration Middle aged mice treated with GHK Cu peptide administered intraperitoneally or intranasally show behavioral rescue but divergent hippocampal aging programs bioRxiv Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference Molecular structure of the tripeptide GHK Cu. In solution lysine Download Scientific Diagram