Amazon.com: Copper Peptides Serum for Face Peptides Collagen Renewal & Anti Aging Serum GHK Cu, EGF, Hyaluronic Acid,Collagen Anti Wrinkle, Firming, Moisturizing Korean Skin Care,25mL 0.88 Fl Oz : Beauty & Personal Care This is where peptides like GHK Cu + Epithalum come in to support you. How GHK Cu Helps GLP 1 Patients Supports collagen + elastin helps prevent loose skin during rapid GHK Cu: My secret weapon for skin, hair, and healing, I use it two ways topical cream for my face, and subQ injections 3x a week., It boosts collagen, tightens skin, helps hair grow, and even RFK Jr.'s peptide push could unleash risky drugs STAT First Opinion