Copper GHK + Facial Serum Kizer Wellness LLC 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 Molecular crystal structure of the tripeptide GHK Cu. In solution, Download Scientific Diagram 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. GHK Cu Peptide Hormone Replacement Therapy Los Angeles Peptides for Plastic Surgery: Weight Loss, Skin, Healing & Recovery