La Roche-Posay Mela B3 Serum is an intensive anti-dark spot treatment that combines 10% Niacinamide (Vitamin B3) with patented Melasyl™ technology. This concentrated serum targets hyperpigmentation, persistent dark spots, and post-acne marks while preventing their recurrence. The serum contains La Roche-Posay Thermal Spring Water and features a lightweight gel texture for optimal absorption. It has been specifically tested on dark spot-prone skin and is formulated to intercept excess melanin production before it marks the skin. The formula is suitable for sensitive skin and helps achieve a more even skin tone while providing anti-recurrence protection against future dark spots.