Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Most people think GHK Cu is just a beauty peptide. But look at this Same person. Same lighting. Real skin change. GHK Cu works by activating repair genes in the body helping with 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 a growing body of peer GHK Cu Copper Peptide: The Ultimate Peptide For Longevity