GHK Cu Secretagogue Gold, Orange, 30 Stick Packs, 0.53 oz (14.9 g) Each 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 Peptide Therapy for Skin Rejuvenation LIVV Natural The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu Peptide: What It Does for Body Composition and Metabolic Health