Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect El GHK Cu (Copper Peptide) for Hair Supports healthier, stronger looking hair Helps nourish the scalp and hair follicles Promotes thicker, fuller appearance Encourages improved 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care Peptide Labz Copper Peptide Hair Growth Serum, 10% GHK cu, 5% AHK cu, Rejuvenates Follicles Walmart.com