15% Niacinamide Purity SerumA high performance Niacinamide serum designed for visibly clearer, more balanced skin. Dr. Altheas 15% Niacinamide Purity Serum combines a concentrated dose of Niacinamide with sebum regulating and soothing actives to target uneven tone, dullness, and excess oil all with a lightweight, fast absorbing texture that never feels sticky. The potent formula helps refine skin texture, reduce the appearance of enlarged pores, and support a brighter, more even