FLUORIDE IN THE BODY
WHAT HAPPENS to fluoride once it has entered the human body? To answer this question one of two methods is usually used.
In one the total quantity of fluoride consumed over a given period from all food and drink is measured and compared with the amounts of fluoride eliminated through the kidneys and bowels. This approach, however, is only partially reliable because some fluoride leaves the body with sweat, saliva, and tears, all of which are difficult to collect. The procedure was first reported in 1891 by two German pharmacologists, J. Brandl and H. Tappeiner, who over the course of 21 months fed slightly more than 14 ounces (403 g) of sodium fluoride to a 28-pound dog.1 During this period the dog excreted 81 % of the fluoride through the kidneys and bowels. Of the fluoride detected in the dog when they then killed it…
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