Since 1947 Synergistic Antioxidant Support Gluten, Wheat & Dairy Free Suitable for Vegetarians Kosher Parve Dietary Supplement Solgar's Hy-Bio C offers 500 mg of pure Vitamin C robustly combined with natural citrus bioflavonoids and rutin, which may enhance the absorption and utilization of Vitamin C. Vitamin C is a water-soluble nutrient with revered antioxidant and immune supportive properties. Along with 550 mg of natural bioflavonoids and 50 mg of natural bioflavonoids and 50 mg of rose hips, each single tablet serving of Hy-Bio offers synergistic antioxidant support to combat cell-damaging free radicals which can cause premature aging.Solgar