Oral care compositions containing:a free-B-ring flavonoid and flavanas well as at least one bioavailability-enhancing agent are provided. Methods of using the oral compositions are also provided.本案提供口腔護理組合物,其包含:自由-B-環(free-B-ring)黃酮類化合物及黃烷以及至少一種生物利用率增強劑。本案亦提供使用該口腔組合物之方法。