Boulder The tendency of GHK copper to repair collagen to a normal state leads to the following potential aesthetic benefits: The tightening of loose skin and reversal of thinning skin related 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 GHK Cu Peptide: What It Does for Body Composition and Metabolic Health PSA] Albeit rare Copper peptide "uglies" are real and scary. Case report and looking for advices : r SkincareAddiction