The new guidance no longer recommends the use of fluoride tablets, drops, or lozenges in children under the age of three, and limits their use in older children to those at high risk of tooth decay. The move marks a substantial shift in federal policy, as such supplements have been prescribed to infants as young as six months for decades.
New Safety Assessment Drives Tighter Federal Limits
The FDA‘s updated stance is based on a fresh scientific evaluation which found that fluoride supplements offer limited benefits for primary (baby) teeth, while raising potential concerns about effects on children’s gut health, cognition and overall development.
“For the same reason fluoride may work to kill bacteria on teeth, it may also alter the gut microbiome, which may have broader health implications,” the FDA said in its statement. While the agency has not issued a full market withdrawal, it has sent warning letters to four manufacturers, directing them to limit the marketing of their products in line with the new age and risk guidelines.
The FDA’s review cited possible links between ingestible fluoride and weight gain, gastrointestinal symptoms, and cognitive effects in children. Although the agency acknowledged that some associations remain unclear, it highlighted growing evidence from multiple studies suggesting caution. One referenced study reportedly found no clear evidence that supplements reduce tooth decay in baby teeth, a key justification for their historic use.
The decision comes in the broader context of the Trump administration’s Make America Healthy Again strategy, led by Health Secretary Robert F. Kennedy Jr, who has been a vocal opponent of fluoride in drinking water. In public remarks, Kennedy described the move as “protecting our kids from the risks associated with ingestible fluoride”, and reiterated calls to halt water fluoridation entirely.
Dental Groups Challenge Fda’s Conclusions Over Access and Equity
The new federal limits have sparked concern within the dental community, particularly among practitioners serving rural and underserved populations. According to the American Dental Association (ADA), fluoride supplements remain a valuable tool in preventing tooth decay in areas where community water supplies are not fluoridated.
Scott Tomar, spokesperson for the ADA on water fluoridation, noted that while the FDA’s latest report took a “more measured and thoughtful approach” than earlier proposals suggesting a full ban, the association still believes the benefits of prescription fluoride outweigh the risks when used properly.
The FDA maintains that toothpaste and mouthwashes containing fluoride, along with professional treatments applied by dentists, are not affected by the new guidelines. These products are considered safe because they are not swallowed and are subject to existing regulatory controls.
Meanwhile, anti-fluoride advocacy groups, such as the Fluoride Action Network, have welcomed the changes as a step in the right direction, though they continue to push for a complete removal of fluoride tablets from the market. The Department of Health and Human Services has announced plans to create a national research strategy, aimed at further examinations in oral health and broader physiological impacts.
