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Toothpastes that promise whitening or gum health are another .

美白功能的牙膏和保健口香糖是另外的反例。

Toothpastes and mouthwashes are good sources of fluoride .

牙膏和漱口水是氟的良好来源。

Natural toothpastes generally do not contain sugar , and some contain xylitol .

天然牙膏一般都不含糖，有的加的木糖醇。

A chemical in toothpastes and soaps has been linked with brain damage to babies in the womb .

子宫里的胎儿的脑损伤跟牙膏和肥皂所含的化学成分有关系。

Tartar-control toothpastes are useful for people who tend to build up tartar quickly .

控制牙垢的牙膏对于很快形成牙垢的人是很有用的。