GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? AHK Cu vs GHK Cu Difference Between GHK Cu and AHK Cu Not all hair serums are built the same This one is powered by a dual copper peptide system GHK Cu + AHK Cu Designed to support: stronger feeling hair improved elasticity Thick, healthy hair starts at the follicle , Meet GHK Cu the copper peptide thats turning heads in hair science., This powerful peptide:, Enlarges follicles & thickens strands, Boosts blood Cellular Glow Hair Serum 10% GHK Cu + 5% AHK Cu Peptides R 10% Ghk Cu + 5% Ahk Cu Copper Peptide Hair Density Serum