Fluoride Allergy – Myth or Reality?

Written & Reviewed by Dr David Chen

You must’ve come here because you think you may be allergic to fluoride. Perhaps the source for all of your woes is due to the fluoridated toothpaste and tap water that you’ve been guzzling.


Are you curious as to whether or not it is possible to have a fluoride allergy? Well, we were curious about that too so we had to do extensive research in order to come to an answer for it. Information on it was very difficult to come across…

Is it possible to be allergic to fluoride?

Unfortunately it is certainly possible to be allergic to fluoride because you can develop an allergy to virtually anything in this world. However the chances of you having one are extremely rare. In fact, there is very little information about it online to begin with.

Of course, the anti-fluoride websites truthaboutfluoride and fluoridealert do have information about it. However they all reference a case study by Dr. George Waldbott who was a well known activist against water fluoridation. Clearly his claims and statements would be biased against fluoride so we can’t base all of our information on his study alone.

We tried searching through the reputable well known public sites such as CDC, FDA, and NHS but they all yielded zero results:

  • site:CDC.gov “fluoride allergy”
  • site:FDA.gov “fluoride allergy”
  • site:NHS.UK “fluoride allergy”

Research studies about possible allergic reactions

There was no information about potential allergic reactions to fluoride at least according to major government organizations. However google scholar did yield some results.

A study by West China Journal of Stomatology where they documented a case report about an allergy to sodium fluoride glycerin. They did note that it was extremely rare but these were the symptoms:

  • Mucosal edema with a large number of red miliary granules.
  • Swallowing difficulties but no breathing difficulties.
  • Large ulcers of oral mucosa.

A study by the Journal of American Academy of Dermatology documented how a 55 year old woman was allergic to stannous fluoride toothpaste. She developed cheilitis and urticaria around her mouth. However, what they found out was that she was actually allergic to the stannous and not specifically the “fluoride”.

periodic table of elements
Credit: Double Sharp

Stannous fluoride (SnF2) is basically fluoride mixed with tin to stabilize it so the woman was actually allergic to the metal element Sn and not the F. All fluorides in toothpaste and water are usually mixed and stabilized with some other elements. There was one study that found an allergic reaction to amine fluoride in toothpaste, which isn’t very common in the US.

In regards to toothpastes, there was one study which examined allergies to toothpaste ingredients. They searched through all case studies from 1900-2016 and found 47 cases of 60 people who were allergic to toothpaste. Essentially over the course of 116 years, only 60 people were found to have developed a reaction…

Last but not least, we found one study which reported that two individuals developed contact stomatitis fluoride varnish. Fluoride varnish is just a highly concentrated version of sodium fluoride which you find in toothpaste.

Symptoms of fluoride allergy

Overall it does seem like it is possible to be allergic to fluoride but it is extremely rare. Of the few documented cases of fluoride allergy, it was always fluorine mixed in with other substances. There is a good chance that the individual could’ve been allergic to some of the other ingredients in it.

Nonetheless here are the potential symptoms if you were allergic to it:

  • Vomiting
  • Abdominal pain
  • Headaches
  • Scotomata
  • Personality changes
  • Muscular weakness
  • Painful numbness in extremities
  • Joint Pain
  • Migraine headaches
  • Dry mouth
  • Oral ulcers
  • Convulsions
  • Mental deterioration
  • Colitis
  • Pelvic hemorrhage
  • Urticaria
  • Nasal congestion
  • Skin rashes
  • Epigastric distress
  • Hematemesis

All of the alleged symptoms were provided by the American Academy of Allergies but they conclusively denied that it could be possible from water fluoridation. Their statement was “there is no evidence of allergy or intolerance to fluorides as used in the fluoridation of community water supplies”.

How can I tell if I’m allergic to fluoride?

In case you were wondering if you could be allergic to fluoride it is actually quite easy to tell. Fluoride isn’t just present in our toothpastes and drinking water because a lot of foods naturally have them.

According to Harvard University, foods that are high in fluoride are:

  • Black tea
  • Coffee
  • Potatoes
  • Oatmeal
  • Raisins
  • Canned shellfish like blue crabs or shrimps

We fact checked Harvard just to make sure and indeed black tea is very high in fluoride. In fact, studies have found that those who drink a lot of black tea don’t even need their water to be fluoridated. If they had fluoridated water that would actually put them at risk of taking in too much fluoride.

black tea

Last but not least, America’s favorite beverage coffee is also high in fluoride. It doesn’t have as much as the black tea but it still has a fair amount. Studies have shown that different coffee beans and brewing methods also affected the fluoride quantity in them.

Therefore if you routinely drink coffee or tea and haven’t had a reaction yet, chances are that you do not have an allergy to it. Also if you eat potatoes such as french fries, chips, or mashed ones you also don’t have an allergy. But like we said… it is an extremely rare allergy.

Fluoride allergy test

We tried to look for a laboratory test that you could use to test for a fluoride allergy and we couldn’t actually find one. It was strange but all we can find are blood tests that test for exposure to fluoride or if fluoride is present in your water supply.

There wasn’t any information about a test to see if you were allergic to just fluoride! Perhaps it is not popular or there is no need for one? We’re not sure.


So can you have an allergy to fluoride? Potentially yes but it is extremely rare for an individual to have that.

First of all, the American Academy of Allergies denies it and we can’t find any information about it from the CDC nor FDA. We also can’t find any available fluoride allergy tests for purchase.

However we did find some rare case studies about potential fluoride allergies. But, we think these case studies may not be 100% related to pure fluoride. It could be other ingredients in the product which triggered the allergic reaction. That may explain why the massive toothpaste allergy study only found 60 cases over the course of 116 years.

Overall, just based on common sense and logic we would say it is extremely unlikely for a person to be allergic to fluoride. You just have to take into consideration that everyone drinks either tea or coffee around the world and those are high in fluoride. Then there is also the fact that if you were allergic to fluoride, you can’t eat french fries…

We really haven’t met too many of those people… So yeah, if you’re able to consume tea, coffee, or potatoes you’re most likely not allergic to fluoride. There really is no excuse for you to avoid all of the wonderful benefits that fluoride can provide for your teeth!


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