Quercetin is n flavonoid (plant pigment) commonly found in fruits and vegetables, especially onions, citrus, apples, dark berries, grapes, olive oil, green tea, red wine and more that possesses potent antioxidants. Adding Quercetin to your balanced diet along with regular exercise may offer a wide array of benefits. Amazing Nutrition Quercetin 500 Mg is offered in Veggie Capsule to suit most diet preferences.