Advanced GHK Cu Face Cream 2400mg 4% Firmer Skin Neurogan Neurogan Health Unlocking the Secrets of GHK Cu: The Revolutionary Peptide for Youthfu GHK Cu Copper Peptide 0.5% (topical foam) Shell Medical Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK