GHK CU PEN PeptiMax UK Neurogan Health Advanced GHK Cu 1200mg Copper Peptide Face Serum 4% 30ml Buy GHK CU Online in Australia GHK CU Peptide for Sale Not all copper peptide serums are created equal And this is where a lot of people get confused. You'll see copper peptides on the label and expect amazing results but the GHK Cu 50mg (UK) Research Use Only 1 2 Vials GHK CU 50mg OP Labs (Formerly Oxford Peptides)