. Our Medicube TXA Niacinamide 15% Serum provides powerful dark spot, acne scar, and uneven skin tone care. Enhanced with 10-layer hyaluronic acid, panthenol, and coral moss extract, it calms and soothes the skin while strengthening the skin barrier for a visibly clearer, healthier complexion. This lightweight, low-irritation serum delivers 72-hour lasting hydration, ensuring your skin remains radiant and refreshed. Transform your skincare routine and reveal a more vibrant you with every use.