GHK cu Lyophilized 100mg Research Grade Compound GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has GHK Cu Peptide Copper Peptide for Cellular Repair (50mg) Naolux Labs XL GHK CU 50mg GHK Cu (100mg), A naturally occurring copper binding peptide found in the human body., It is widely studied for its role in skin repair processes, collagen production, and tissue regeneration