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The U.S. Public Health Service currently recommends a fluoride level of 0.7 milligrams per liter of water to maximize oral health benefits while minimizing the risk of fluorosis, a condition ...
The same was true for fluoride levels of less than 1.5 mg/L, which is the upper safe limit of fluoride in drinking water as established by the World Health Organization.
Water fluoridation, which is the act of adding fluoride to drinking water to reach a recommended level, is designed to help prevent cavities, the ADA explains. The ADA refers to this as a “cost ...
The research had two goals: (1) to warn communities with a high concentration of fluoride of the danger, initiating a reduction of the fluoride levels in order to reduce incidence rates of fluorosis, and (2) to encourage communities with a low concentration of fluoride in drinking water to add fluoride in order to help prevent tooth decay. By ...
In 2024, a U.S. government study released by HHS found higher levels of fluoride exposure, such as drinking water containing more than 1.5 milligrams of fluoride per liter (which is the recommended safe limit set by the WHO), are associated with lower IQ in children. [21]
Though fluoride can come from a number of sources, drinking water is the main source for Americans, researchers say. Nearly two-thirds of the U.S. population currently gets fluoridated drinking water, according to CDC data. Since 2015, federal health officials have recommended a fluoridation level of 0.7 milligrams per liter of water.