Many pigment-fighting serums contain a blend of tyrosinase-targeting ingredients, however. So, use the list as a general guide, but always patch-test! •Milder: Licorice root, Uva ursa (bearberry), peony extract •Medium: Arbutin, kojic acid, azelaic acid, tranexamic acid, resorcinol, ascorbyl glucoside •Heavy duty: Hydroquinone
