Cavities in children could increase by millions if fluoride is banned, study suggests
An estimated 25.4 million more teeth will result in tooth decay in the next five years if fluoride is banned from the U.S. public water supply, according to a recent model simulation.
The study also predicted an estimated $9.8 billion will be spent on additional dental care over the next five years.
Some states like Utah and Florida have already banned fluoride from the state's public water supply.
Researchers created a model to estimate the impact a ban on fluoride in the United States water supply would have on children's dental health and the results are bleak.
The simulations estimated that a ban would result in tooth decay in 25.4 million more teeth, which is equivalent to a decayed tooth for one out of every three children over the next five years. The results were published in Jama Health Forum on May 30.
"There's strong evidence from other countries and cities, such as Calgary in Canada, showing that when fluoride is eliminated, dental disease increases. Our study offers a window into what would happen in the United States if water fluoridation ceased," Lisa Simon, MD, DMD, and senior author of the study, said.
Why you should care
Not only would eliminating fluoride increase the occurrence of tooth decay, but the estimated cost of dental care would rise exponentially, according to the study.
By the numbers
The models simulated the potential dental care costs over five and 10 years.
$9.8 billion in additional dental care costs over five years
$19.4 billion in additional dental care costs over 10 years
"Most of the increased cost could be attributed to publicly insured children, meaning it would be a direct public health cost," said Simon.
Dig deeper
Fluoride strengthens teeth and reduces cavities by replacing minerals lost during normal wear and tear, according to the CDC. In 1950, federal officials endorsed water fluoridation to prevent tooth decay, and in 1962 set guidelines for how much should be added to water.
Fluoride can come from several sources, but drinking water is the main one for Americans, researchers say. Nearly two-thirds of the U.S. population gets fluoridated drinking water, according to CDC data.
The addition of low levels of fluoride to drinking water was long considered one of the greatest public health achievements of the last century. The American Dental Association credits it with reducing tooth decay by more than 25% in children and adults.
About one-third of community water systems — 17,000 out of 51,000 across the U.S. — serving more than 60% of the population fluoridated their water, according to a 2022 CDC analysis.
What they're saying
"We know fluoride works. We're able to show just how much it works for most communities and how much people stand to lose if we get rid of it," said Simon.
Big picture view
U.S. Health Secretary Robert F. Kennedy Jr. has said he wants communities to stop fluoridating water, and he is setting the gears of government in motion to help make that happen.
Kennedy has said he plans to tell the Centers for Disease Control and Prevention to stop recommending fluoridation in communities nationwide. And he said he's assembling a task force of health experts to study the issue and make new recommendations.
Two states have already banned adding fluoride to public water systems. These include Florida and Utah.
The Source
Information for this article was taken from the Centers for Disease Control and Prevention website, a study that observed oral health and water fluoridation data collected from 8,484 children aged 0-19 which was published in JAMA on May 30, 2025, a Mass General Brigham news release about the study, and reporting by The Associated Press. This story was reported from Los Angeles.
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