Quercetin 500Quercetin 500 features 500 mg of quercetin in one capsule to promote a healthy immune response, support cardiovascular and endothelial health, and support antioxidant status.* Why quercetin? Quercetin is one of the most studied dietary flavonoids and is often found in a variety of plant foods including fruits, vegetables, and tea. Although a lot of foods contain quercetin, the daily intake of quercetin for a person following a typical Western diet is