Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum GHK Cu for Hair: Can It Stimulate Follicles & Help Hair Growth? GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B