No: No, Fluoride is not absorbed through the skin inside your mouth. Some Fluoride may be retained on the surface of your oral mucosa, where it is then available to help re-mineralize your teeth after acid exposure, but it is not absorbed.
Answered 6/25/2014
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Definitely, yes: The fluoride in toothpaste, mouthwash, foods, water, bread and beverages can be absorbed through the mucosa of the mouth and from under the tongue into the bloodstream without needing to go through your digestive system.
Answered 4/2/2015
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