TIRTIR Niacinamide 20% Serum is a lightweight brightening serum designed to improve the look of uneven tone, enlarged pores, and dull skin. Formulated with 20% niacinamide, alpha-arbutin, glutathione, hyaluronic acid, retinol, and Zinc PCA, it helps skin appear smoother, clearer, and more radiant while supporting moisture balance. The fast-absorbing texture layers easily with other skincare products and is suitable for daily use on all skin types.

After cleansing and toning, apply an appropriate amount to the skin and gently pat until absorbed. Use SPF during the daytime.