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While both are formulated with 0.5% c-PDRN, a proprietary marine growth factor once only available via an injectable, the Dual Effect Ampoule is more focused on firming and reducing the look of fine lines
Never apply copper peptides on the same day as retinol, acids, or other active ingredients
Note: some secondary sources cite the 2018 Neelakantan Biochem Pharmacol paper under differing PMIDs (29155147 vs 29355482)
Glutathione helps reduce melanin production, supporting a lighter and more even skin tone