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 AHK Cu (Raw) 1g Ion Peptide AHK Cu vs. GHK Cu Peptides: Key Differences in Copper Mediated Signaling Research AHK CU Copper Peptide Powder, 99% min, CAS 682809 81 0, 1 gram GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective?