Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides Peptide Therapy for Pain Management and Healing Core Medical & Wellness 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 GHK Cu Youthful Skin, Healthy Cells, Vibrant You. GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link