Rutin is a bioflavonoid related to quercetin and hesperidin found in both citrus and non-citrus fruits as well as other foods such as buckwheat. Rutin is a powerful combatant of free radicals and is best known for its role in vascular health.* Rutin helps to maintain the structural integrity of blood vessels such as veins and capillaries.* Scientific studies suggest that it may help to support vascular function and promote healthy circulation.* NOW? Rutin is vegetarian and derived from a non-citrus source.