Natural Factors Vitamin C 1000 mg with Bioflavonoids & Rosehips is a superior antioxidant formulation containing citrus bioflavonoids, along with a 4:1 extract of rosehips. Bioflavonoids and rosehips improve the absorption and therapeutic action of vitamin C and enhance each other’s activity. In addition to its antioxidant activity, vitamin C provides immune function support. Reg. price $17.48