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GHK-Cu consists of glycine, histidine, and lysine arranged in sequence (Gly-His-Lys), with a Cu²⁺ ion coordinated by the histidine imidazole, the N-terminal amine, and additional ligand contributions L-Glutathione 1000mg – Antioxidant, Immune Support & Cell Protection – Sowelo | eBay Pumps:Yes SC_Dark Spots https://i.ebayimg.com/images/g/XagAAOSwru9nIabM/s-l400.jpg
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