Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix Hair Growth Serum Ghkcu Etsy AHK Cu isnt just another peptideits a follicle activator , Expands follicle size helping strands grow thicker and fuller over time, Extends the growth phase keeps hair growing longer Where science meets stronger hair. A lightweight serum powered by 10% GHK Cu & 5% AHK Cu, designed for visibly thicker roots and a resilient scalp barrier. Fuller, healthier looking hair begins here. [