Some bottled water products contain fluoride, especially if the source water naturally is enriched with fluoride. If the water used in the product is purified, distilled, demineralized, or deionized, however, the water likely contains no fluoride. Exceptions to this are products in which fluoride has been added back to the water as an extra ingredient.
Manufacturers may not be required to add fluoride to bottled water. In the United States, for example, the Food and Drug administration does not make it mandatory for manufacturer's to add fluoride. Usually, the only way to find out how much fluoride is in a certain brand of bottled water is to reach out to the manufacturer.
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