GHK Cu Repairing Serum 30ml SumaNurica GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu Repairing Serum 30ml SumaNurica Ozark Have you heard of GHK Cu the copper peptide your body is already making? GHK Cu (Glycyl L Histidyl L Lysine Copper) is a naturally occurring tripeptide found in human plasma, saliva, and urine. Neurogan Copper Peptide Hair Scalp Serum for Fuller Softer Shinier Hair Walmart.com