Radiance Firming GHK Cu Copper Cream with Argireline Leuphasyl Peptides for Face eBay With out being able to inject in actual face this peptide has shown some promising results! This is after 6 weeks of a daily topical application GHK Cu Argireline Leuphasyl 0.2% 0.5% 0.5% Cream What is GHK Cu? GHK Cu is a naturally occurring copper peptide composed of three amino acids bound to copper. It functions as a signaling molecule in the skin, helping to support repair processes, GHK Cu Copper Peptide Skincare Bundle RegenMed Direct