Support your seasonal inflammatory response with Quercetin 500 mg. Quercetin, a powerful antioxidant, works to help neutralize free radicals and reduce oxidative stress in your body. It provides fast-acting defense for your sinus and upper respiratory system. Quercetin 500 mg is completely plant-based and sourced sustainably. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.