Chemistry / Elements

if fluoride is considered toxic, then why do they put it in tooth paste and municipal drinking water supplies?

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  1. Many things we drink/eat/use every day are toxic if we use too much of them at one time. Fluoride is one of those things. In small amounts it is good for the enamel of the teeth. The fluoride forms a mixed compound quite similar to the mineral apatite. Through the years the use of fluoride has decreased tooth decay enormously. You can read more about it here.
    http://en.wikipedia.org/wiki/Apatite

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