GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect Think of it like building a foundation for your hair. Jeff explains how we use GHK Copper peptides and biologics to give follicles exactly what they need to thrive. It is a more Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia