The Wolverine Peptide Stack: BPC 157 + TB 500 Dosage and Protocol Defy GHK Cu (glycyl L histidyl L lysine) is a naturally occurring copper binding peptide found in human plasma. As levels decline with age, so may its support of the biological processes involved in collagen production, skin Peptide Calculator Cellgenic 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care Seraphime BPC 157 Pure Oral Spray, .85 Oz (120 sprays) Marty Ross MD Supplements Ghk Cu Peptide