Brightening Serum | ANUA Niacinamide 10 + TXA 4 Serum is a targeted dark spot correcting formula designed to brighten skin tone and fade acne scars. With 10% Niacinamide to control oil and strengthen the skin barrier, and 4% Tranexamic Acid (TXA) to reduce pigmentation, this serum helps improve uneven tone for a clearer, smoother, and more radiant complexion. Its lightweight, non-sticky texture absorbs quickly and is suitable for daily use—even for sensitive skin.