Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix AHK Cu (200mg) AHK Cu (Copper Tripeptide 3) Ingredient Guide Nubeean Noosa AHK Cu and Hair Follicle Cell Cultures Core Peptides 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 AHK CU Peptide for Hair Growth Plu Labs Discovery Size (10 ml)