La Roche-Posay Mela B3 Serum is a groundbreaking dark spot corrector formulated with the exclusive Melasyl™ molecule and 10% niacinamide. Developed over 18 years of research, Melasyl™ acts as a melanin trapper, targeting a range of skin discolorations including sun spots, age spots, and post-acne marks. This serum visibly reduces persistent dark spots while respecting the natural skin tone, delivering long-lasting results for all skin types.