Discoloration DefenseDiscoloration Defense is a layerable, daily use dark spot corrector clinically proven to reduce the appearance of key types of skin discoloration, including hard to treat forms such as stubborn brown patches and post acne marks. Formulated with 3% tranexamic acid, 1% kojic acid, 5% niacinamide, and 5% HEPES, this latest generation formula improves the appearance of skin discoloration, brightens skin, and evens skin tone in as early as 2 weeks.