Fend off dullness with a brightening serum made with a cocktail of pigmentation-fighting plant extracts and antioxidants. With vitamin C (one of the most well-researched and proven ingredients for brightening and firming), licorice root and palmaria palmata extracts (skin-lightening agents that inhibit pigmentation), and niacinamide (a form of vitamin B3 that reduces the appearance of discoloration), uneven skin tone can become a thing of the past.