日本科研人员最近指出，每天吃一块巧克力，可以防止发生牙洞。他们发现，作为巧克力糖主要原料的可可豆，其某些主要部分可以阻止口腔细菌的侵入，中止牙齿受到的腐蚀。牙洞一般是在链球菌属（streptococcus）产生一种叫做葡萄糖的粘性分子时发生的。牙洞可以帮助细菌将自己固 Japanese researchers recently pointed out that eating a piece of chocolate every day to prevent the occurrence of dental holes. They found that some of the major components of cacao beans, the main raw material for chocolate candy, prevent oral bacterial intrusion and stop the erosion of teeth. Tooth cavities generally occur when streptococcus produces a viscous molecule called glucose. Dental cavities can help bacteria to solid themselves