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. Water-soluble nutrient with revered antioxidant and immune supportive properties. 550 mg of natural bioflavonoids and 50 mg of rose hips. Synergistic antioxidant support to combat cell-damaging free radicals which can cause premature aging.