Advanced GHK Cu Copper Peptide Serum 1% (300mg 30 ml (Pack of 1) Buffet" + Copper Peptides 1% The Ordinary Sephora GHK CU Copper Peptide, Hair & Scalp Serum, 2 oz (60 ml) GHK Cu may be trending, but it's nothing new to us. We have been using GHK Cu (our Copper Peptide Complex) for over 15+ years post treatment and in your dialy routine. #GHKCu #CopperPeptides # GHK Cu 99%+ Pure Peptide Amino Club Amino Club Biossance Squalane + Copper Peptide Rapid Plumping Serum