GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Copper Peptide Regenerating Serum for Glowing Skin and Hair 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 Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 GHK Cu (50 MG) Sigma Compounds