GHK Cu (Copper Peptide) has emerged as one of the most promising regenerative peptides for hair restoration due to its ability to stimulate follicular activity, improve scalp circulation, reduce inflammation, and prolong the Copper Tripeptide (GHK Cu) for Advanced Skincare & Haircare Formulatio GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? 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 Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides