Fluoride occurs naturally in the body as calcium fluoride. Calcium fluoride is mostly found in the bones and teeth.
Small amounts of fluoride help reduce tooth decay. Fluoridation of tap water helps reduce cavities in children by 50 - 60%. Fluorides also help maintain bone structure. Low doses of fluoride salts may be used to treat conditions that cause faster-than-normal bone loss, such as menopause.
Fluoridated water, and food prepared in fluoridated water, contains fluoride. Natural sodium fluoride is in the ocean, so most seafood contains fluoride. Tea and gelatin also contain fluoride.
Fluoride deficiency may appear in the form of increased cavities, and weak bones and teeth. Fluoride supplementation is necessary to prevent cavities, especially in children, if tap water is not fluoridated. As an example, well water is not fluoridated.
Excess fluoride in the diet is extremely rare.
The Food and Nutrition Board at the Institute of Medicine recommends the following dietary intake for fluoride:
Adolescents and Adults
The best way to get the daily requirement of essential vitamins is to eat a balanced diet that contains a variety of foods from the food guide pyramid.
Specific recommendations depend on age and gender, Ask your health care provider which amount is best for you.
Diet - fluoride