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 Buy AHK Cu AHK Cu: what kind of peptide it is, properties, features, and use in cosmetics AHK CU (Copper Tripeptide 3) 50mg High Purity Peptides: Online Wholesale and Retail 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 GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective?