Quercetin the most abundant dietary flavonoid plant pigment naturally found in fruits and vegetables, has powerful antioxidant properties. quercetin helps to reduce the damage and irritation caused by free radicals. Promotes cardiovascular health. the antioxidative properties of quercetin help ease oxidative stress and have a protective effect on cardiovascular health. quercetin is also known to help sustain healthy blood pressure levels already in the normal range. Quercetin as an antioxidant flavonoid also helps support immune defences and support the body’s natural response to inflammation. quercetin is also known to support healthy aging.