GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? AHK Cu Research Guide Canada Copper Peptide for Hair Growth Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule GHK and AHK copper peptide topical serum tutorial This gives a roughly 3% concentration of both peptides. Great for any hair + skin protocol Comment and let me know if you Does it work? Maneup GHK Cu hair growth serum : r tressless