IT has been assumed that there is only one form of fluoride in serum, the inorganic F ion. It would therefore seem that either the value for serum fluoride which I found (1 µM) (refs. 1 and 2 ...

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This led to the broad U.S. adoption of adding fluoride in community water supplies and eventually its inclusion in dental products such as toothpaste and mouthwash. No federal law mandates ...