Optimum-C Formula Vcaps provide 1000 mg of buffered vitamin C from pure calcium ascorbate with rose hips, rutin and acerola, plus 100 mg of Leucoselect grape seed extract and 500 mg of citrus bioflavonoids, including hesperidin, from fresh oranges, lemons, tangerines, grapefruits and limes. Available in easy-to-swallow vegetable capsules for maximum assimilation and absorption.