Amazon.com: Copper Peptide Hair Serum with Copper Tripeptide 1 Dual Peptide Scalp Treatment plus Licorice Root Extract : Beauty & Personal Care Amazon.com: Neurogan GHK Cu (Copper Peptide) Neck & Face Serum 1,200mcg (1 oz bottle) : Beauty & Personal Care GHK Cu Copper Peptide Supplement, Promotes Skin Repair, Reduces Wrinkles eBay If you're playing with raw GHK Cu, here's the secret that makes it actually work on your skin: mix it with hyaluronic acid. Not microneedling, not fancy devices just a clean This is a product I purchased on Amazon, so I want to give it a quick review. *~Dumie GHK CU Facial Serum~* This is a Copper Peptide serum that is working amazingly for Amazon.com: GHK Cu Copper Peptides Serum for Face: Advanced Anti Aging Serum with Multi Peptide and Niacinamide for Fine Lines and Skin Elasticity : Beauty & Personal Care