Yamamoto K, Ikeya T, Okuyama S, et al. - Researchers assessed if and how the frequency of daily tooth brushing is related with the development of nonalcoholic fatty liver disease (NAFLD). They obtained data from all participants who had a health checkup during span of a retrospective longitudinal study performed from 2005 to 2012. Overall data from 25,804 people were analyzed. The development of NAFLD occurred in 3,289 (12.7%) participants. A significantly reduced risk of developing NAFLD was observed in association with increased frequency of daily tooth brushing. Participants who brushed their teeth frequently had a significantly reduced risk of NAFLD development. The adjusted odds ratio of developing NAFLD for brushing teeth 1-2 times a day was 0.85, and for 3 times a day, it was 0.74.