Fluoride is a trace mineral that occurs naturally in the body, and is found primarily in the teeth and bones. Fluoride’s main function is to discourage the onset of tooth decay.
The vast majority of fluoride comes from consuming water from community systems, to which it is added. It is found naturally in ocean water, so seafood contains it in some amount. There are also small amounts present in tea and gelatin. Fluoride deficiency leads to weaker bones and teeth and an increased risk of cavities.