Let's talk copper peptides We get asked this all the time: What's the difference between GHK and CP Serum? Here's your quick guide: GHK (first generation) Beautiful blue serum The Human Lab Rats Injecting Themselves with Peptides Office for Science and Society McGill University Peptides for Plastic Surgery Recovery: A Clinical Guide to GLOW, KLOW, and NAD Plus Frank Agullo, MD GHK Cu peptide guide. : r NTNPerformance