Fluoride is a natural component of minerals in rocks and soils. Widespread use of fluoride in water supplies and oral health products is credited with the dramatic decline in dental caries among children and adults alike. All water contains fluoride, but it is sometimes necessary to add it to some public supplies to attain the optimal amount for dental health. Fluoride makes tooth enamel stronger and more resistant to decay. It also prevents the growth of harmful bacteria and interferes with converting fermentable carbohydrates to acids in the mouth.
Reprinted from the International Food Information Council Foundation, (2009)