GHK Copper Peptide GHK Cu Tripeptide 1 Prescription Only Skin Rejuvenation Cream I've been using this since December to make sure it is as good as they say it is.and it definitely is! This is NOT an over the counter Amazon.com: Neurogan GHK Cu Copper Peptide Face Cream 4% Peptides for Skin Firmness & Deep Hydration Daily Facial Moisturizer with 2400 MG GHK Cu, 2oz : Beauty & Personal Care Advanced GHK Cu Face Cream 2400mg 4% Firmer Skin Neurogan Neurogan Health GHK Cu For Sale (100 mg) Biotech Compounds Amazon.com: Copper Peptide Face Cream Anti Wrinkle 1.7 fl oz Copper Tripeptide 1, Repair, and Firming Daily Face Cream : Beauty & Personal Care