C Extra + Quercetin 500 mg / 250 mg · Bioflavonoids 90 Easy Swallow Capsules Supports immune function Contains antioxidants that help protect against free radicals Helps in collagen formation to maintain healthy bones, cartilage, teeth, and gums Supports the body’s ability to metabolize nutrients Assists in preventing vitamin C deficiency Overview Natural Factors C Extra + Quercetin Bioflavonoids is an immune-support formula that combines the antioxidant benefits of vitamin C and the bioflavonoid quercetin in a synergistic 2:1 ratio. Vitamin C helps in collagen formation to maintain healthy bones, cartilage, teeth, and gums, while quercetin enhances the activity of vitamin C in the body. Quercetin is currently being studied for additional health benefits. Medicinal Ingredients Each capsule contains: Vitamin C (ascorbic acid) 500 mg Quercetin (bioflavonoids) 250 mg Non-Medicinal Ingredients Vegetarian capsule (carbohydrate gum [cellulose], purified water), microcrystalline cellulose, vegetable grade magnesium stearate (lubricant), stearic acid, silica.