AHK Cu Active Peptide Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz R 10% Ghk Cu + 5% Ahk Cu Copper Peptide Hair Density Serum 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 Copper Peptide Powder, 99% min, CAS 682809 81 0, 1 gram