GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B 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 # Neurogan Copper Peptide Hair Scalp Serum for Fuller Softer Shinier Hair Walmart.com Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb GHK CU Copper Peptide, Hair & Scalp Serum, 2 oz (60 ml)