GHK Cu Copper Peptide Hair Tonic for Fuller Looking Hair 12 Week Supply (30 mL) Private Label Ghk Cu Serum Copper Peptide Hair Growth Copper Peptide Serum for Hair Growth Peptide Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum eBay Small molecules. Powerful results. Experience Peptide Power with Hairgenetix's advanced Copper Peptide Hair Growth Serum, formulated with 10% GHK Cu and 5% AHK Cu to support hair health at the follicle level. Helps GHK Cu Copper Peptide Hair Growth Serum Blackbird Skincare: Custom Skincare & Beauty Manufacturer Tailored Solutions for Every Brand