Anua Niacinamide 10 TXA 4 Serum 30ml is a potent Korean skincare serum designed to diminish dark spots, hyperpigmentation, and acne scars, promoting a brighter, "glass-skin" complexion. It features a powerful, lightweight formula that includes 10% niacinamide, 4% tranexamic acid, and 2% arbutin to target stubborn pigmentation and improve skin tone.