All About GHK Cu Peptide More Than Just Cosmetic GHK Cu is a powerful copper peptide that supports collagen production, skin and hair health, and tissue repair. It may help reduce fine lines, improve elasticity, and promote faster healing. Want to learn GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health Peptide Labz Copper Peptide Hair Growth Serum, 10% GHK cu, 5% AHK cu, Rejuvenates Follicles Walmart.com GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B