Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum PDF) The effect of tripeptide copper complex on human hair growth in vitro 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care More than hair its cellular support , GHK CU is a well studied copper peptide known for its role in supporting:, Healthier looking hair & scalp environment, Hair that appears thicker, 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