Your body made this peptide every day until you turned 30. Then it stopped. GHK Cu (copper peptide) is a naturally occurring tripeptide discovered in 1973. At age 20, your plasma levels sit A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend GHK CU ACETATE Topical Foam Compounded Liposomal Copper GHK mL QS0137 Quicksilver Scientific GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B