Tiam Pore Minimizing Niacinamide 21 Serum is a high-strength serum formulated with 21% niacinamide to visibly reduce the appearance of enlarged pores, regulate sebum production, and brighten dull skin. Enriched with zinc PCA and arbutin, it helps refine skin texture and even out tone without irritation. Ideal for oily, combination, and acne-prone skin types looking to control excess oil and improve overall clarity.