La Roche-Posay Mela B3 Serum is a dark spot correcting and brightening serum designed to reduce hyperpigmentation, post-acne marks, sun spots, and uneven skin tone. It contains 10% Niacinamide (Vitamin B3) and Melasyl™, an exclusive ingredient that helps target excess melanin before dark spots become visible. The lightweight formula is suitable for all skin types, including sensitive skin, and helps leave the skin looking clearer, brighter, and more even-toned.