Medically Reviewed by Dr. Charles Poblenz, DMD on September 11, 2026
Yes. Based on the current evidence and the published positions of the American Dental Association and the Centers for Disease Control and Prevention, fluoride is safe and effective for helping prevent tooth decay when it is used in the recommended amounts. What has changed is the conversation around it. Since 2024, a federal toxicology review, a new Florida law, and an FDA action on fluoride supplements have all made headlines, and it is reasonable to wonder what any of that means for your family’s toothpaste, tap water, and dental visits.
At JAX Dental Studio, Dr. Charles Poblenz and our team hear these questions from Jacksonville patients regularly. With decades of experience in general dentistry and a commitment to evidence-based care, we want to give you the facts with dates attached, so you can see what the research found, what changed in the law, and what stayed the same. This page reflects the research and policy picture as of October 2026.
What Is Fluoride?
Fluoride is a naturally occurring mineral found in soil, rock, water, and many foods. It is not a synthetic chemical created in a laboratory, though it can be refined and added to products like toothpaste and, in some places, public water supplies. In the United States, fluoride toothpaste is regulated by the FDA as an over-the-counter drug, and many brands also carry the American Dental Association’s Seal of Acceptance, a voluntary program that reviews products for safety and effectiveness.
The confusion often stems from the fact that fluoride, like many substances, can be beneficial in appropriate amounts but harmful in excessive quantities, just as water is essential for life, yet drinking too much can be dangerous. According to the American Dental Association, fluoride protects teeth from cavities by restoring enamel damaged by plaque through a process called remineralization. This understanding has been developed through decades of research and real-world application.
When used as directed in toothpaste, mouth rinses, and professional treatments during your preventive dentistry visits, fluoride has consistently demonstrated its ability to strengthen tooth enamel and help prevent decay. The key phrase here is “as directed”: following recommended guidelines helps you receive the benefits without exposure to potentially harmful levels.
What Are Common Fluoride Safety Concerns?
Many fluoride concerns stem from misunderstandings about dosage and application methods. One frequently cited worry involves fluorosis, a cosmetic condition that can cause white spots or discoloration on teeth. Fluorosis generally occurs only when children consistently consume excessive amounts of fluoride during tooth development, typically from swallowing large quantities of toothpaste or drinking water with naturally high fluoride levels.
Professional dental treatments, such as fluoride applications during routine cleanings, use controlled amounts applied directly to teeth rather than ingested. These treatments, which we provide as part of comprehensive dental care and as a dedicated fluoride treatment option, are carefully measured and removed from your mouth after application, which limits concerns about systemic exposure.
Another common concern involves community water fluoridation, which has been used in the United States since 1945 to help reduce community-wide tooth decay. The U.S. Public Health Service recommends a fluoride level of 0.7 milligrams per liter for communities that fluoridate, and the CDC continues to publish that level as its guidance. That recommended level is separate from the Environmental Protection Agency’s enforceable maximum for fluoride in drinking water, which is 4.0 milligrams per liter. You can review the current guidance directly from the CDC’s community water fluoridation resources. If you prefer to limit fluoride from any source, you can discuss alternative preventive measures with our team during your next appointment.
What the 2024 Federal Review Found About Fluoride and IQ
The most widely discussed new research is a monograph from the National Toxicology Program, part of the National Institutes of Health, finalized on August 21, 2024. After reviewing studies published through October 2023, the NTP concluded with moderate confidence that higher fluoride exposures, defined as drinking water containing more than 1.5 milligrams per liter, are associated with lower IQ in children. Most of the studies behind that finding were conducted outside the United States, in places where natural fluoride levels can be much higher than typical U.S. water.
The same report is clear about its limits. The NTP stated there were insufficient data to determine whether the 0.7 milligrams per liter level recommended for U.S. community water affects children’s IQ. The review was not designed to evaluate fluoridated drinking water alone, it did not assess fluoride’s benefits, and it found no evidence of adverse effects on adult cognition. You can read the summary on the National Toxicology Program’s fluoride page.
The American Dental Association has responded that the monograph does not address community fluoridation at the low levels used in the United States. In practical terms, the 1.5 milligram per liter threshold the NTP studied is roughly twice the U.S. recommended level. Researchers continue to study lower exposures, and we follow that work as it is published.
What Changed in Florida and Federal Policy in 2025 and 2026
Fluoride policy moved quickly over the past two years. Here is a dated summary of the changes most relevant to Jacksonville families.
Florida Ended Added Fluoride in Public Water on July 1, 2025
Governor Ron DeSantis signed Senate Bill 700 on May 15, 2025, and the law took effect on July 1, 2025. The bill does not use the word fluoride. Instead, it prohibits public water systems from adding certain additives that are not used to meet drinking water quality standards, which ends the practice of adding fluoride. According to the Florida Department of Health, 97 water providers in 27 counties stopped fluoridating on that date. Florida was the second state to take this step, after Utah’s ban took effect in May 2025. The ADA News coverage of the Florida law summarizes the bill and the dental community’s response.
What the Law Means for Jacksonville Tap Water
For many Jacksonville households, the law changed less than the headlines suggested. JEA stated publicly in May 2025 that it has never added fluoride to its drinking water. The fluoride in JEA water occurs naturally in the Floridan aquifer, and the utility’s most recent testing at that time showed levels between 0.4 and 1.22 milligrams per liter. Other Northeast Florida utilities, including those in Clay and St. Johns counties, also described the fluoride in their water as natural. If you want to know the current level at your home, your utility’s annual water quality report lists it, and private well owners can have their water tested. The Florida law applies to public water systems; it does not restrict fluoride toothpaste or the fluoride treatments applied in a dental office.
The FDA Restricted Some Fluoride Supplements for Children
On October 31, 2025, the FDA announced it would take enforcement action against companies marketing unapproved ingestible fluoride prescription drugs, such as tablets and drops, labeled for children under age 3 or for older children at low or moderate risk of tooth decay. Earlier that year, in May 2025, the agency had said it would begin steps to remove these products from the market, so the final action was narrower than first proposed. The ADA and the American Academy of Pediatric Dentistry both said supplement decisions should rest on a dentist’s or pediatrician’s clinical judgment. Because the ADA’s dosing guidance depends on a child’s age and the fluoride level in the water they drink, this is a decision to make with your child’s dentist or pediatrician rather than on your own. The ADA News report on the FDA action explains the change in more detail.
Federal Reviews Are Still Underway
In April 2025, the Department of Health and Human Services said it would ask the Community Preventive Services Task Force to review fluoridation, and HHS Secretary Robert F. Kennedy Jr. said he planned to tell the CDC to stop recommending it. On April 7, 2025, the EPA committed to a new review of fluoride’s health risks in drinking water. The EPA released a preliminary assessment plan for public comment on January 22, 2026, and published its protocol for a fluoride toxicity assessment on August 3, 2026. As of October 2026, the EPA’s enforceable limit remains 4.0 milligrams per liter, and the EPA’s fluoride in drinking water page tracks each step of its review. We will update this page as those reviews are completed.
The Science Behind Fluoride’s Benefits
Research spanning several decades shows that fluoride helps prevent tooth decay across age groups. Studies of communities with access to fluoridated water have generally found lower rates of cavities, even when accounting for other factors like diet, oral hygiene habits, and access to dental care, and the CDC has estimated that community water fluoridation reduces tooth decay by about 25 percent. Fluoride toothpaste provides a separate, topical benefit every time you brush, whether or not your water contains fluoride.
For children, fluoride can provide particular benefits during the years when permanent teeth are developing. Adults can also benefit from fluoride’s protective effects, especially as root surfaces become more susceptible to decay with age. The mineral works by making tooth enamel more resistant to acid attacks from bacteria in your mouth, which helps create a stronger defense against the daily challenges your teeth face.
Here are the key ways fluoride can protect your oral health:
- Remineralizes the early stages of tooth decay before cavities form
- Strengthens tooth enamel against acid attacks from plaque bacteria
- Reduces harmful bacteria’s ability to produce cavity-causing acids
- Provides ongoing protection when present in saliva throughout the day
- Offers particular benefits for high-risk individuals with frequent cavities
Professional fluoride treatments can be especially valuable for patients with certain risk factors, such as dry mouth conditions, frequent snacking habits, or a previous history of extensive dental work. If you have questions about how cavities form in the first place, our team is happy to walk through your specific risk factors at your next visit.
Fluoride Across Different Life Stages
Fluoride needs can shift depending on your age and life stage. Parents are often surprised to learn that a child’s first dental visit should happen close to their first birthday, which is a good time to discuss fluoride exposure and how often your family should schedule cleanings. For young children, the usual guidance is a rice-grain-sized smear of fluoride toothpaste until about age 3 and a pea-sized amount after that, with an adult supervising so the child spits rather than swallows. Expectant mothers sometimes ask whether fluoride use should change during pregnancy; we cover this in more detail in our guide to dental care during pregnancy, since hormonal changes can affect gum health and cavity risk.
Older adults may also want to revisit their fluoride routine, particularly if medications or health conditions have caused dry mouth, since reduced saliva flow can raise cavity risk. In each of these cases, the right amount and form of fluoride depends on your individual history, which is why we tailor recommendations during your exam and cleaning rather than applying a one-size-fits-all rule.
Making Informed Decisions for Your Family Regarding Fluoride
The decision about fluoride use should be based on individual risk factors, family preferences, and professional guidance rather than fear-based information. During your consultation, we can assess your specific cavity risk, discuss your concerns, and develop a personalized approach that aligns with your comfort level and oral health needs.
For families choosing to avoid fluoride, alternative preventive strategies become even more important. These might include more frequent professional cleanings, dietary modifications, enhanced home care routines, and additional protective measures like dental sealants for children’s molars. The goal remains the same: helping prevent tooth decay, though the methods may vary based on your preferences.
Your Partner in Making the Right Choice About Fluoride
At JAX Dental Studio, we respect your right to make informed decisions about your family’s oral health while providing you with accurate, science-based information to guide those choices. Dr. Poblenz’s Fellowship in the Academy of General Dentistry and our team’s combined decades of experience mean we stay current with the latest research and can help you sort through conflicting information you might encounter online or from well-meaning friends and family members.
Whether you choose to embrace fluoride as part of your oral health routine or prefer alternative approaches, we’re here to support your decision with comprehensive care tailored to your needs. We believe the best dental care happens when patients feel informed, comfortable, and confident in their choices. Reach out through our website to discuss your concerns and discover how we can help you maintain optimal oral health using approaches that align with your values and comfort level.
