Receive FREE Kiehl’s Dark Spot Solution. A targeted dark spot corrector that helps even skin tone and boost radiance. Formulated with Activated C (a stabilized form of Vitamin C), buffered Salicylic Acid, and Peony extract, this efficacious brightening serum helps visibly reduce the appearance of a broad array of discolorations including dark spots, hyperpigmentation and post-acne marks. Dermatologist-tested for safety and gentleness on all skin types, including sensitive.