GHK Cu Copper Peptide Hair Serum 30ml Azur Skin Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum Multi Peptide + Copper Peptides 1% The Ordinary Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum Meet the ingredient your skin has been waiting for. GHK Cu, or Copper Tripeptide 1, is one of the most researched anti ageing actives in skincare. It firms. It renews. It supports collagen. And now