: . Dr. Shintre breaks down what it is and why it works. ? A copper based peptide that naturally occurs in your GHK Cu Copper Peptide Hair & Scalp Serum YanaSecrets Copper Peptide GHK CU Conditioner for Hair Growth Mall of California Copper Tripeptide For Thinning Hair Regrow Serum Essence Oil DHT Blocker GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum