Fluoridation (Drinking Water)

Almost all naturally occurring water has some amount of fluoride. Fluoride is a mineral that prevents and reverses tooth decay caused by bacteria in the mouth. Eating sugar and refined carbohydrates causes these bacteria to produce an acid that removes minerals from the surface of teeth. Fluoride helps remineralize the surface of teeth and prevents cavities from continuing to form. In the 1930s, scientists discovered that the frequency and severity of tooth decay were lower among people who had higher levels of natural fluoride in their drinking water. Extensive studies that followed found that fluoride becomes concentrated in plaque and saliva, which helps prevent the breakdown of tooth enamel.

In 1945, Grand Rapids, Michigan, added fluoride to its municipal water system, adjusting the amount of fluoride ...