No. There is no credible evidence that small amounts of fluoride are harmful.
Almost all dental products contain fluoride and some places even have a tiny amount added into water.
Fluoride makes your teeth stronger and more resistant to acid and carious damage. It is also antibacterial. Therefore it is recommended by dentists and is good for your teeth in correct concentrations.
Excessive concentrations can be toxic and stain your teeth, but these are not normally found. Correctly used fluoride is a very safe chemical.
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