Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides Peptide therapy NL GHK Cu in the elimination of hair loss and weakenin Synthagen PL 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 Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum Anagen Phase of Hair Growth