Immune Support Targeted Wellness Potency · Purity · Pride Antioxidant Support Dietary Supplement Unique combination of antioxidant nutrients. What is Quercetin & Vitamin C? Quercetin & Vitamin C is a combination formula featuring 700 mg of vitamin C as ascorbic acid and 250 mg of quercetin per single-capsule serving. Quercetin is a type of flavonoid found in plant foods (especially apples, onions and green and black teas) with antioxidant properties. Vitamin C is a natural compound also found in fruits and vegetables. It’s water soluble and must be continually replaced because the body does not make or store the nutrient. What are the key benefits of Vitacost® Quercetin & Vitamin C? Vitamin C is needed to form the protein collagen, which the body uses to make skin, tendons, ligaments and blood vessels. Vitamin C supports the development and repair of the body’s tissues. Because vitamin C is an antioxidant, it can reduce the damage that free radicals, chemicals and pollutants cause to the body’s cells. Promotes the maintenance of healthy DNA. Maintains a healthy cardiovascular system. Helps maintain healthy blood pressure already within normal range. Maintains a healthy bladder wall. Promotes a healthy colon.