Quercetin Complex Powerful antioxidant to support your overall health and well-being! Quercetin is a plant-derived bioflavonoid found in fruits, vegetables, and grains. Bioflavonoids give many fruits and vegetables their color Bioflavonoids, such as Quercetin, are antioxidants -- they neutralize free radicals, compounds excess of which can interfere with your body's functions and speed up the aging process. Antioxidants can neutralize free radicals and may reduce or even help prevent some of the damage they cause. Natrol Quercetin is a combination of Quercetin, Vitamin C and a Citrus Bioflavonoid Complex designed to support your optimal health and well-being. Support your overall health with Natrol Quercetin!