GHK Cu Copper Peptide Benefits, Uses & Safety Intra V What Are GHK Cu Peptides for Skin and Hair Health? 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 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care GHK Cu Copper Peptide Shampoo Anti Hair Loss Shampoo Promotes New Peptide Labz