Copper Peptides for Skin: The Science, Benefits, and Best Practices Hubmed BPC 157 NAD+ GUK Cu Peptide Patch Medical Imaging and Therapeutics GHK Cu (copper peptide) is a science backed anti aging compound that supports collagen production, skin regeneration, and overall skin health. Used in both topical serums and subcutaneous Molecular crystal structure of the tripeptide GHK Cu. In solution, Download Scientific Diagram