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GHK-Cu Copper Peptides Face Serum | PLU Labs 02 · product specifications GHK-Cu is a copper complex rather than a plain tripeptide, and that changes what release testing has to establish: alongside RP-HPLC purity and mass confirmation of the Gly-His-Lys backbone, the copper-to-peptide stoichiometry has to be right, because a partially loaded batch behaves as a mixture of complex and free peptide with different activity Choose Your Bundle:50 Pack | 2oz size https://imgv2-1-f.scribdassets.com/img/document/905688547/298x396/450df0f845/1756046551?v=1 Safe Handling
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