Quercetin 500 mg from webber naturals contains a concentrated source of the bioflavonoid quercetin in easy-to-swallow vegetarian capsules. Quercetin is used in herbal medicine to protect blood vessels, including the capillaries. It also provides a source of antioxidants to help your body neutralize the free radicals responsible for oxidative damage.features: source of antioxidantsused in herbal medicine as a capillary/blood vessel protectantcontains 500 mg of quercetin per capsuleused by allergy sufferersfeatures easy-to-swallow vegetarian capsulesfree of artificial colours, preservatives, or sweetenersnon-gmo and suitable for vegans