GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu for Hair Loss: Evidence, Safety, and UK Treatment Options Bolt Pharmacy GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B 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.