GHK CU Peptide for Skin Rejuvenation Wittmer Rejuvenation Clinic GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? PSA] Albeit rare Copper peptide "uglies" are real and scary. Case report and looking for advices : r SkincareAddiction 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