Peptide Therapy for Hair Growth: Explore Your Options Two Ingredients. Real Hair Transformations. How Neurogan Health's GHK Cu Serum Is Changing What Customers Expect From Hair Care GHK Cu what is fact and what is fiction?, GHK Cu is a naturally occurring copper peptide involved in healing, inflammation control, and tissue repair., Its gone viral as a hair growth solution, Copper Peptide GHK Cu Copper Peptide GHK Biotin Peptide for Hair Growth: The Science Behind Scalp Renewal I'm Fabulous Cosmetics GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect