Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz Amazon.com: Neurogan GHK Cu Copper Peptide Hair & Scalp Serum 2400mg, 4% Copper Peptides Fast Absorbing, Water Based Formula for Hair Softness & Shine Cosmetic Dry Scalp Moisturizer Spray, Made in USA : Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum eBay 2 weeks in on GHK Cu and the glow is REAL. Brighter complexion More even skin tone Less breakouts Softer fine lines Thicker, fuller hair This is just A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend GHK Cu 50 mg Copper Peptide Research Grade PRG