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 GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy GHK CU Copper Peptide, Hair & Scalp Serum, 2 oz (60 ml) A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend GHK Cu Peptide Benefits and Side Effects: What to Expect from Injections GHK Cu Copper Peptides: Topical vs Injectable