COSRX The Niacinamide 15 Serum
High-dose niacinamide serum (15%) targeting brightening, pore refinement, and barrier support. Minimalist ingredient list following COSRX's clean-active formulation philosophy.
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Reviewed Full Ingredient List (INCI order)
Full order reviewed for US-en on 2026-07-20. Official formula source → Formulas can change; confirm the current package.
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★ Key ingredients