The Medicube TXA Niacinamide 15 Serum is a high-strength brightening serum formulated with 15% niacinamide and tranexamic acid (TXA) to effectively target dark spots, hyperpigmentation, and uneven skin tone. Enhanced with arbutin, glutathione, and ferulic acid, it works to visibly improve skin clarity, fade acne scars, and boost radiance while supporting the skin barrier. Its lightweight, non-sticky texture absorbs quickly and is suitable for all skin types, including sensitive skin, thanks to its fragrance-free and dermatologist-tested formula.