Driving through downtown Dallas, you might see a striking banner hanging at the U-turn bridge, near the Walnut Hill exit on Central Expressway (US 75): “Stop Fluoridation!” Below it, other banners demand action and warn of supposed dangers.
It’s not the first time fluoride has been at the center of public debate.
Since 1951, fluoride has been added to community water supplies in many countries to prevent tooth decay. Fluoridation started as an observation, then an idea that ended as a scientific revolution 50 years later.
Fluoridation is the controlled careful addition of a precise amount of fluoride to community water systems to enhance dental health, ensuring it remains safe without causing systemic health side effects.
The practice has been hailed as one of the “ 10 greatest public health achievements of the 20th century.”
But with Robert F. Kennedy Jr., a vocal opponent of fluoridation of water supplies, being tapped by President-elect Donald Trump to lead the Department of Health and Human Services, this progress is under threat.
I am a clinical professor specializing in caries management, with over 30 years of experience in preventing and treating early decay. In my view, it is crucial to rely on evidence-based practices and research that have consistently shown fluoride to be a cornerstone of dental health, benefiting millions without adverse effects.
Fluoride in the water supply
Fluoride is a naturally occurring mineral found in water, soil and even certain foods. Its role in oral health was first recognized in the early 20th century when researchers observed lower rates of tooth decay in communities with naturally high levels of fluoride in their water.
In 1945, Grand Rapids, Michigan, became the first city in the world to intentionally fluoridate its water supply. This decision came after thorough discussions with Dr. H. Trendley Dean, head of the dental hygiene unit at the National Institutes of Health at the time, and other public health organizations. The Michigan Department of Health approved adding fluoride to the public water supply the following year.
The city was chosen due to its low natural fluoride levels, a large population of school-age children, and proximity to Muskegon, which served as a control city. After 11 years, the results were remarkable: Cavity rates among children in Grand Rapids born after fluoridation began dropped by over 60%.
By 2008, over 72% of the U.S. population – over 200 million Americans – using public water systems had access to fluoridated water.
This scientific breakthrough transformed dental care, turning tooth decay into a preventable condition for the first time in history.
Fluoride is naturally present in most water sources, but typically at concentrations too low to prevent tooth decay. By adjusting the fluoride level to the recommended 0.7 milligrams per liter, equivalent to about three drops in a 55-gallon barrel, it becomes sufficient to strengthen tooth enamel.
Benefits of fluoride for tooth health
The science is simple: Fluoride strengthens tooth enamel, the protective outer layer of teeth, by promoting remineralization. It also makes teeth more resistant to the acids produced by bacteria in the mouth. This helps prevent cavities, a problem that remains widespread even in modern societies.
Fluoridated water has been extensively studied, and its benefits are well documented. According to the Centers for Disease Control and Prevention, water fluoridation reduces cavities by about 25% across all age groups. It’s a public health measure that works passively – every sip of water helps protect your teeth, without requiring you to change your behavior.
This is especially important for vulnerable populations. Low-income communities often face barriers to accessing dental care or fluoride products like toothpaste. By fluoridating water, communities provide a safety net, ensuring that everyone benefits regardless of their circumstances.
Economically, it’s a smart investment. Research shows that for every dollar spent on fluoridation, communities save about US$20 in dental treatment costs. These savings come from fewer fillings, extractions and emergency visits – expenses that disproportionately affect low-income communities.
Opposition to fluoridation
Despite its benefits, water fluoridation is not without controversy. Opponents often argue that it infringes on personal choice – after all, most people don’t get to opt out of drinking community water. Others raise concerns about potential health risks, such as fluorosis, bone issues or thyroid problems.
Fluorosis, a condition caused by excessive fluoride exposure during childhood, is often cited as a reason for alarm. However, in most cases, it manifests as mild white spots on teeth and is not harmful. Severe fluorosis is rare in areas with regulated fluoride levels.
What about other health risks? Decades of research, including large-scale reviews by expert panels from around the world as well as the World Health Organization, have found no credible evidence linking fluoridation to serious health problems when fluoride levels are kept within recommended limits. In fact, the fluoride concentration in drinking water is carefully monitored to balance safety and effectiveness.
The CDC oversees the monitoring of fluoride levels in community water systems across the United States. Meanwhile, the Environmental Protection Agency establishes a safety standard of 2 milligrams per liter to prevent mild or moderate dental fluorosis.
Still, the debate continues, fueled by misinformation and mistrust in public health initiatives.
It’s important to separate legitimate concerns from unfounded claims and rely on the overwhelming body of evidence supporting fluoridation’s safety.
The anti-fluoride movement has a powerful ally – Robert F. Kennedy Jr. – tapped by President-elect Donald Trump to run the Department of Health and Human Services.Fluoride alternatives
For those who prefer to avoid fluoride, there are alternatives to consider. But they come with challenges.
Fluoride-free toothpaste is one option, but it is less effective at preventing cavities compared with fluoride-containing products. Calcium-based treatments, like hydroxyapatite toothpaste, are gaining popularity as a fluoride alternative, though research on their effectiveness is still limited.
Diet plays a crucial role too. Cutting back on sugary snacks and drinks can significantly reduce the risk of cavities. Incorporating foods like crunchy vegetables, cheese and yogurt into your diet can help promote oral health by stimulating saliva production and providing essential nutrients that strengthen tooth enamel.
However, these lifestyle changes require consistent effort and education – something not all people or communities have access to.
Community programs like dental sealant initiatives can also help, especially for children. Sealants are thin coatings applied to the chewing surfaces of teeth, preventing decay in high-risk areas. While effective, these programs are more resource-intensive and can’t replicate the broad, passive benefits of water fluoridation.
Ultimately, alternatives exist, but they place a greater burden on people and might not address the needs of the most vulnerable populations.
Should fluoridation be a personal choice?
The argument that water fluoridation takes away personal choice is one of the most persuasive stances against its use. Why not leave fluoride in toothpaste and mouthwash, giving people the freedom to use it or not, some argue.
This perspective is understandable, but it overlooks the broader goals of public health. Fluoridation is like adding iodine to salt or vitamin D to milk. These are measures that prevent widespread health issues in a simple, cost-effective way. Such interventions aren’t about imposing choices; they’re about providing a baseline of protection for everyone.
Without fluoridated water, low-income communities would bear the brunt of increased dental disease. Children, in particular, would suffer more cavities, leading to pain, missed school days and costly treatments. Public health policies aim to prevent these outcomes while balancing individual freedoms with collective well-being.
For those who wish to avoid fluoride, alternatives like bottled or filtered water are available. At the same time, policymakers should continue to ensure that fluoridation levels are safe and effective, addressing concerns transparently to build trust.
As debates about fluoride continue, the main question is how to best protect everyone’s oral health. While removing fluoride might appeal to those valuing personal choice, it risks undoing decades of progress against tooth decay.
Whether through fluoridation or other methods, oral health remains a public health priority. Addressing it requires thoughtful, evidence-based solutions that ensure equity, safety and community well-being.
Noureldin is a clinical professor of cariology, prevention and restorative dentistry at Texas A&M University.
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Children watch a July Fourth Parade along the Walkway of Heroes and Independence Avenue on July 04, 2026 in Tappan, New York.
The Great American Grumpfest
Our nation’s 250th birthday party didn’t feel especially patriotic and wasn’t as much fun as the 200th anniversary was.
President Trump, who did his best to co-opt our holiday for his personal aggrandizement, was a major reason. The party he threw in Washington, D.C., was crankier than uplifting, and less about celebrating our shared past and a promising future than about reminding us how far we have strayed from our founders’ plan to create a republic that future Americans would keep in good working order.
Credit Trump this much. He has a singular gift for picking at scabs that other politicians would rather ignore and pushing us into reckonings we don’t need.
The thing is, Americans have seen all this before. Sometimes the makeover we were encouraged to undertake was more conservative, sometimes more liberal. Whatever direction we were pushing, however, the reckoning we had in mind this time had to be more forthright and the conclusion more definitive than it was the last time.
Our current discontents, the ones behind the reckoning President Trump has been trying to inspire, are not trivial. Included among them are immigration, birthright citizenship, exploding healthcare costs, election rigging, a gag-inducing national debt, how we educate our children, too many genders, racial differences we can’t move past, a lopsided economy that favors more well-off Americans, and historic levels of political corruption and graft. Add to these the several foreign adventures he has pushed us into or is anxious to undertake, and you have the makings of a national headache the likes of which we haven’t had in half a century.
All the elbow-throwing and overheated rhetoric we’re using today have begun to look almost normal in all the ways that bickering neighbors and feuding family members appear normal. But they have also made us look mean-spirited and have portrayed our differences as irreconcilable. To ourselves, of course, but also to many people outside the United States who might be forgiven for turning their heads and not looking at the national car wreck we Americans show no interest in avoiding.
The good news, as I suggested above, is that Americans have had a great deal of practice dealing with challenges and national car wrecks like these.
This essay begins to lay out the reasons why.
By way of illustration, we have our seemingly insatiable demand for more bad news about race in America.
Sixty years after being released from the legal constrictions that bedeviled both white and black Americans, many white people have come to believe the color that used to make them unassailable is now a sign of a moral inferiority born of a racial animus they can never wash off. Many black people, on the other hand, are insisting that America is as hopelessly stacked against them as the formerly unassailable white people’s ancestors used to tell their black ones.
The result is that many people today are buying into racist nightmares and mumbo jumbo that their black and white ancestors worked hard and effectively to put in each other’s heads.
This might be dismissed as crazy behavior if it weren’t so important to rituals Americans have long used to express their deepest fears about each other while figuring out what move they can make that won’t end with their world crashing down on everybody’s head.
Unfortunately, the kind of cultural sleight of hand we have used to ramp up our racial differences has been appropriated by people who have many other cultural fears and unresolved differences with each other. Their clumsy but culturally prescribed missteps are making all these other issues look as irremediable as our racial problems.
A good place to start an answer to how we back away from ledges is Alexis de Tocqueville’s writing on early-19th-century American democracy. He had an optimistic take on Americans’ unscripted displays of public bravado, recrimination, and payback.
For him, these were occasions when people tried to mitigate the effects of the unfair hand they were dealing someone else or had themselves been dealt by behaving in ways quite at odds with how they would otherwise be expected to act. These inversions of what Tocqueville called “the natural order of conscience” presented themselves as a loud but culturally muted challenge to the hypocrisies that people had built into the world they’d made together.
One of his favorite illustrations of early-American hypocrisy involved slave masters sleeping with their less-than-worthy slaves. To the best of my knowledge, he didn’t pick up on all the ways that slaves messed with their owners. Their well-chronicled and quiet resistance showed that even severely ill-treated people can exercise more control over their lives than outsiders appreciate.
Be that as it may, such inversions of a people’s “natural order of conscience” make a good public show of them wrestling with demons they can’t or may not want to shake off, but in any case, are nowhere close to figuring out how to cast out.
Implicit in these disruptions was the discomforting idea that people might flip the entire script and turn the world on its head in more permanent ways. That kind of flipping worked out better for us in our revolution against England than in our Civil War. These events taught us the value of stepping back from historically unprecedented ledges.
Americans of late have been giving loud expression to a long list of things they don’t like about each other and the last makeover they started but didn’t finish a half-century ago. The outcome of our fights today will be as revealing as they are embarrassing to everyone who imagined they could recast our country in a way that privileged their favorite kind of Americans.
Their disappointment with the accommodations they strike will be palpable, but the middling results they achieve with all their pushing and shoving won’t be anything they can’t live with.
Anthropologists who have written about such moments in other cultures less “advanced” than our own show that people find ways to work around their seemingly irreconcilable differences without ever fully resolving them. Indeed, the patches and repairs people make have the unheralded effect of reinforcing rather than undermining the legitimacy of the practices and values they thought were fundamentally flawed.
For example…
White guilt and black pessimism do more good than putting cash into the pockets of professional shamers and handwringers. They give the rest of us who don’t feel guilty or powerless more time to make the world less racially unequal. Good news.
Regarding illegal immigration, the entrance requirements for future immigrants will remain stringent. Americans will applaud the continued detention and deportation of the few illegal immigrants who commit serious crimes. Good news.
All the people who came to the United States without being legally vetted and were locked up for a time will be released in numbers small enough to avoid serious media attention. Along with the several million other good people who snuck in but avoided capture, the former detainees will go to school, find gainful employment, pay their taxes, and stay out of trouble. Many will eventually become citizens. Good news.
Investigations into election tampering and Donald Trump’s 2020 presidential loss will come to an unceremonious conclusion the day after his second term ends. Many Americans will grumble about this, but there will also be some quiet partying, too. Good and bad news.
Congressional hearings into all the grifting accomplished by people tied to the Trump administration will end without anyone having to pay a dime back to the American taxpayers. Bad news, we’ll learn to live with.
New laws and regulations will be created in the hope that the kind of corruption practiced by President Trump will not be repeated for another 250 years. Good news, I hope we’ll live long enough to enjoy.
Show trials for people who allegedly vandalized the Lincoln Memorial Reflecting Pool, if they happen, will get big television viewer ratings. Good news.
Trials for pardoned Capitol insurrectionists who committed serious crimes after their release should get more attention, but won’t. Bad news.
We will continue to hear nothing from most of the people who were pardoned for crimes they committed in the insurrection at the Capitol on January 6, 2021. They will keep their mouths shut and their heads down for the rest of their life. Good news.
The gold-gilded ornaments that Donald Trump had plastered all over the White House will be shipped to Mar-a-Lago, where the former president will sell them on eBay. Fun news.
American taxpayers end up paying for most of the new East Wing, the removal of the miniature gladiatorial arena that was built behind the White House, and the restoration of the White House rose garden. Bad news.
The Triumphal Arch was never built. Good news.
Trad wives and gay couples raise perfectly lovely children. Good but unsurprising news.
Trans men and women learn that most Americans can’t figure out who they used to be. No one gives a second thought to their use of “family bathrooms” or “unisex bathrooms” in public settings, businesses, and schools. Communities will sponsor athletic teams that have trans boys and girls just to show they can. Good news.
Budget deficits will be kicked down the road for someone else’s children to pay down. Bad news.
Federal agencies that had their budgets and employee ranks slashed during President Trump’s second term are getting some of the money and lost positions back. Good news.
Elite universities will buy their way out of DEI purgatory by competing for conservative scholars whose inflated salaries dwarf those of their liberal colleagues, who will think about suing their institutions for reverse discrimination but won’t be able to figure out who would pay for it or care. More fun news.
Okay. I’ve probably missed some ways that Americans will step back from the ledges they have been making noises about leaping off. But to the extent that my predictions pan out, the best and most important moral of the stories about us stepping away is this: everything we lost and took back, or had returned to us, will have happened without our government collapsing, civic traditions crumbling, or our people beating each other up.
The reason why is that the differences Americans have with each other really weren’t as irreconcilable as we made them out to be. The empty-sounding bromide that Americans have more that unites us than divides us turns out to be true, not just metaphorically but in fact.
Now that is really something to celebrate.
Daniel J. Monti (danieljmonti.com) is Professor of Sociology at Saint Louis University and the author of American Democracy and Disconsent: Liberalism and Illiberalism in Ferguson, Charlottesville, Black Lives Matter, and the Capitol Insurrection.