AHK CU Copper Peptide Powder, 99% min, CAS 682809 81 0, 1 gram 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 How to Apply and Use GHK Cu and AHK Cu Hair Serum for Hair Regrowth Peptide Labz AHK Cu vs GHK Cu Difference Between GHK Cu and AHK Cu