89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper This compound has been studied for over 50 years. Most people discovered it last year on social media. In 1973, Dr. Loren Pickart identified GHK Cu while studying why young blood could Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference GHK Copper Peptide GHK Cu Tripeptide 1