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lyophilized powder Choose Your Bundle:16oz | 10 Pack GHK-Cu | Core Smiles Two of the most commonly referenced forms are: GHK-Cu (Copper Tripeptide-1) AHK-Cu (Copper Tripeptide-3) While both belong to the copper peptide family, they are used differently in cosmetic formulation depending on whether the goal is skin-focused or scalp- and hair-focused performance https://m.media-amazon.com/images/I/810Y6XmCI7L._AC_UF1000,1000_QL80_.jpg

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