Products Skin Care Copper Peptide Serums Skin Biology Unlocking the Power of Copper Peptides in Skincare GHK Cu 50mg Copper Peptide Research Grade Midwest Peptide GHK Cu Peptides Benefits for Anti Aging Skin Rejuvenation How to Use With Micro Infusion 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.