Copper peptides (GHK Cu) have been studied for decades for their role in tissue repair and that same biology applies to hair. Research shows GHK Cu may help strengthen existing hair follicles, reduce Why GHK Cu Became the Most Talked About Peptide in Cosmetic Research Research Guide Tide Labs Tide Labs Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz GHK Cu (Copper) For Sale (50mg) Core Peptides