And the data showed that people who reported tooth and gum disease had lower scores on tests that measured memory and cognition.
数据表明，那些患有牙齿和牙龈疾病的人在记忆力和认知力方面的测试分数也很低。
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Japanese research suggests that green tea drinkers have lower rates of gum disease - the theory being that the antioxidants in green tea, called catechins, reduce inflammation.