Vitamin C Plus Citrus Bioflavonoids Dietary Supplement Vegetarian Kosher Parve Gluten FreeBluebonnet"s C-500 mg Plus Bioflavonoids Caplets provide pure vitamin C from L-ascorbic acid, citrus bioflavonoids complex from fresh oranges, lemons, tangerines, grapefruits and limes, plus hesperidin and rutin. Available in easy-to-swallow caplets.