Fluoride has been a major factor in the decline and severity of dental caries (i.e., tooth decay) in the United States.
When used appropriately, fluoride is both safe and effective in preventing and controlling tooth decay. All U.S. residents are likely exposed to some degree to fluoride, which is available from multiple sources.
In many U.S. communities, public drinking supplies are supplemented with sodium fluoride because the practice is acknowledged as safe and effective in fighting cavities.
Some private wells may contain naturally fluoridated water!