Fluoride is a natural substance that is found in rocks, soil, and water. It prevents tooth decay in children and adults.
Fluoride helps keep teeth healthy by:
- Strengthening tooth enamel
- Reversing early tooth decay by replacing and preventing the loss of minerals that make teeth healthy
- Stopping the growth of bacteria that cause cavities
The U.S. Public Health Service recommends 0.7 parts per million of fluoride in drinking water, or about 3 drops of fluoride in a 55-gallon barrel, to prevent tooth decay.