Fluorine, yes … but not too much!

Is fluorine needed in toothpastes? Yes, some experts say; it is the only active ingredient known to prevent cavities. Not necessarily, other experts answer; too much fluorine may lead to a teeth disease, fluorose, which gives white or yellowish marks on teeth. We do have many occurrences when we are in contact with this substance, through some food or kitchen utensils…

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