2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care 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 99% Purity Ghk Cu Copper Peptide Powder for Skin Repair Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 TOSOWOONG Copper Peptide 12 Cream, 99% Purity of Copper Tripeptide 1, GHK Cu, 12 Multi Peptide