Dr. Michelle Jorgensen

July 14, 2026

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Holistic Health and Wellness

Free Tooth Remineralization Guide from Dr. Michelle Jorgensen

Is Fluoride Good for Your Teeth? A Dentist's Answer

Is fluoride good for your teeth? A dentist weighs the benefits and risks of fluoride

It is one of the most common questions I hear as a dentist: is fluoride good for your teeth, or is it something to avoid? You have probably seen strong opinions on both sides, and the truth is more nuanced than either camp likes to admit.

So let me do something different. Instead of arguing a side, I want to walk you through the honest case for fluoride, the honest case against it, and where I land after decades in practice. Then you can decide what fits your family.

First, what fluoride actually is

Fluoride is a naturally occurring mineral. In the 1930s, researchers noticed that people in areas with more fluoride in their water tended to have fewer cavities, and by the 1940s it was being added to public water and toothpaste. That is how it became the default in modern dental care.

The key thing to understand is that fluoride does not become part of your tooth. It reacts with the enamel surface to form a compound called fluorapatite, which is more resistant to acid.

The honest case for fluoride

Let me be fair to fluoride, because the benefit is real. When it sits on the tooth surface, it does make enamel more resistant to the acids that cause decay. Decades of data show that communities using fluoride have historically had fewer cavities, which is why the CDC and the American Dental Association still support it.

If you use a fluoride toothpaste, you are not doing something harmful. The topical benefit, right where you brush, is the part almost everyone agrees on.

The honest case for caution

Here is where it gets more interesting. Most of the concern is not about a dab of toothpaste you spit out. It is about swallowing fluoride day after day from many sources at once, mainly drinking water.

A few things are worth knowing, framed accurately:

Too much fluoride during tooth development can cause dental fluorosis, the white or brown mottling you may have seen on some teeth.
In 2024, the U.S. National Toxicology Program concluded, with moderate confidence, that higher fluoride exposure, meaning drinking water above 1.5 mg/L, is associated with lower IQ in children. That is more than double the 0.7 mg/L used in U.S. water, and no U.S. based studies exist yet.
Fluoride is not an essential nutrient, and when it comes through the tap there is no way to control the dose per person.

This is the same distinction I keep coming back to. Topical fluoride that stays where you put it is one thing. Swallowing an uncontrolled dose from your water is another, which is a big part of why Utah moved to stop adding fluoride to its water.

Comparison of how fluoride forms a hard outer coating while hydroxyapatite rebuilds enamel from the same mineral it is made of

So is fluoride good for your teeth? My take

As the comparison above shows, fluoride and hydroxyapatite solve the same problem in different ways. Fluoride hardens the outer surface into fluorapatite. Hydroxyapatite is the mineral your enamel is already made of, so it supports the tooth with its own building material. If you want the longer version, I compare the two side by side in a separate article.

After years in practice, here is where I land. Fluoride has a genuine topical benefit, and I do not shame anyone for using it. But I choose to skip it in my own home, because I can get the same enamel support from hydroxyapatite plus a mineral rich diet, without the questions that come with swallowing fluoride. For me, that is the simpler, calmer choice.

Living Well Remineralizing Toothpaste with hydroxyapatite and PROtektin, fluoride-free cool mint

How to strengthen your teeth, with or without fluoride

Whatever you decide about fluoride, the fundamentals matter more than any single ingredient:

Eat a mineral rich, lower sugar diet. My free Tooth Remineralization Guide covers the foods that help.
Brush and floss consistently, and use good technique, which I cover in the secrets of effective teeth cleaning.
Go easy on acidic foods and drinks that soften enamel.
Choose a toothpaste that supports remineralization, such as a hydroxyapatite formula.

The hydroxyapatite option I use

Hydroxyapatite is the mineral that makes up roughly 97 percent of your enamel, so a hydroxyapatite toothpaste works with your teeth rather than coating them. You can read more in is hydroxyapatite safe.

When I could not find a fluoride free paste I loved, I made my own. My Remineralizing Toothpaste pairs hydroxyapatite with PROtektin to support strong enamel and smoother, less sensitive teeth, and we make a kids version too. If you specifically want the fluoride toothpaste side of this question, I go deeper in is fluoride toothpaste bad for you.

Remineralizing Toothpaste with Hydroxyapatite

A fluoride free daily toothpaste built around hydroxyapatite, the mineral your enamel is made of, to support strong, smoother, less sensitive teeth.

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The bottom line

Is fluoride good for your teeth? Topically, it does help harden enamel, and if you use it you are not making a mistake. The real debate is about swallowing an uncontrolled dose over time, mostly from water.

My honest answer is that you have a genuine alternative. Hydroxyapatite lets you support enamel with the very mineral it is made of, no fluoride debate required. Decide what fits your family, and know that healthy teeth are absolutely possible either way.

References

Support your enamel the natural way

Dentist formulated with hydroxyapatite. Fluoride free, family friendly, and made to work with your teeth, not just coat them.

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Prefer to skip the fluoride debate? Try my fluoride free Remineralizing Toothpaste with hydroxyapatite, or grab the free Tooth Remineralization Guide and strengthen your teeth from the inside out.

Dr. Michelle Jorgensen

Dr. Michelle Jorgensen is a dentist, author, speaker, and the founder of Living Well with Dr. Michelle. After practicing traditional dentistry for 10 years, she became seriously ill and discovered she had mercury poisoning from removing mercury fillings for her patients. That journey led her into biological and holistic dentistry, where she has spent more than 15 years since.

She formulated the Living Well line of hydroxyapatite oral care to give families a fluoride free way to care for their teeth with the same mineral enamel is built from.

Is fluoride good or bad for your teeth?

Both sides have a point. Fluoride applied topically does help harden enamel and is not harmful in normal toothpaste use. The concerns are about swallowing fluoride from many sources at once, mainly drinking water, over a long time. Many people choose a hydroxyapatite toothpaste to get enamel support without that question.

Does fluoride actually strengthen teeth?

Fluoride reacts with the enamel surface to form fluorapatite, which is more resistant to acid. It does not become part of the tooth, but it does make the outer surface more acid resistant, which is the benefit almost everyone agrees on.

What is the difference between fluoride and hydroxyapatite?

Fluoride coats the tooth surface with a different compound. Hydroxyapatite is the mineral your enamel is already made of, roughly 97 percent of it, so it supports remineralization with the tooth's own building block.

Do I need fluoride to prevent cavities?

No. A mineral rich diet, good brushing and flossing, limiting acidic foods, and a remineralizing toothpaste such as a hydroxyapatite formula can support strong enamel without fluoride. Fluoride is one tool, not the only one.

Is fluoride safe in drinking water?

At the 0.7 mg/L used in U.S. community water, health agencies consider it safe. The recent concerns, including a 2024 National Toxicology Program review, involve higher exposures above 1.5 mg/L. Some states, such as Utah, have chosen to stop adding it and leave the choice to individuals.

Is fluoride free toothpaste effective?

Yes. A hydroxyapatite toothpaste supports remineralization with the same mineral enamel is made of, and it does it without a poison control warning. It is a reassuring option for both adults and children.

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