One of my cousins is currently attending dental school in the European Union. She recently asked me, “Izabella, is it true that the government adds fluoride to the water supply in the United States in an effort to reduce dental cavities, instead of educating the public about the effect of sugar consumption and nutrition on health?”
Unfortunately, the answer is yes, and while most countries in the European Union do not add fluoride to local water supplies, most communities in the United States continue to be fluoridated.
There can be a lot of confusion about what is safe and not safe when talking about fluoride levels and how exactly it affects our health. Have you found yourself asking any of these questions?:
- Is fluoride actually harmful?
- Other than the water supply, where am I exposed to fluoride?
- What effect does fluoride have on the thyroid?
- How does fluoride impact communities?
- What are the symptoms of fluoride toxicity?
- How can I minimize fluoride exposure?
- Are there supplements that help detox fluoride?
The encouraging news is that there is a lot that we can do to limit our exposure to excess fluoride, eliminate fluoride from our bodies, and educate ourselves about the effects of fluoride exposure in our water supply.
What is Fluoride?
Most people know that fluoride is commonly found in water and has been an important part of dental treatments for decades. As a pharmacist, I am always fascinated with the chemical makeup of different elements and how they might affect the human body—especially the thyroid gland. How can something found in nature be such a hot-button topic for those of us with Hashimoto’s?
Let’s start with the science…
Fluorine is an element in the periodic table that does not occur in the elemental state in nature because it is highly reactive. Fluorine is decomposed into fluorides of different forms, and is found in minerals in the earth’s crust. It is one of the several halogens – which translates from latin as “salt former” – in the periodic table. Other halogens you may be familiar with are iodine and chlorine, and those are controversial as well. (I have written extensively on iodine specifically in this article).
Fluoride is one of many trace minerals, and, like other trace minerals, is not meant to be introduced to the body in large amounts.
So, how did we get exposed to so much fluoride in the first place?
History of Fluoride
Have you ever wondered why fluoride is in our water supply in the first place or if fluoridated water is unique to the United States?
Many of you may know that fluoride was added to the water supplies of most US cities and some cities in the UK in the 1950’s as a public health measure meant to minimize tooth decay. What you may be surprised to hear, however, is that fluoride was used to treat hyperthyroidism up until the 1950’s, prior to the development of other thyroid-suppressing medications!
A dose of 2-5 mg of fluoride per day was typically found to be effective for suppressing an overactive thyroid. If you live in the typical fluoridated community and you’re being a “good girl” (or “good boy”) by drinking your 8 cups of water each day, chances are, you are inadvertently taking in enough fluoride to suppress your thyroid. Most adults in these communities are ingesting between 1.6 and 6.6 mg of fluoride per day.
If this is the history of fluoride use until the 1950’s, how did those of us in the U.S., Canada, and the United Kingdom end up with so much fluoride in our water supply? The truth is that fluoridation partially began as a collaborative effort between dental associations, the U.S. government, and sugar lobbyists who wanted to find a solution that would allow people to have fewer cavities while continuing to consume just as much sugar. If you have read my article on dental triggers, you know that there are better ways to prevent and heal dental decay.
While most westernized countries have rightfully rejected fluoridation without any apparent consequences on tooth decay, the United States, Canada, and parts of the UK continue to fluoridate their water.
Beside Water, Where Else is Fluoride Found?
Some common sources of fluoride include the following:
- Bottled beverages (due to fluoride content in water)
- Toothpaste, mouthwash and other dental hygiene products
- Black tea, red tea, and other teas
- Canned food items
- Black/red rock salt
- Chewing tobacco
- Supplements (always check the labels)
- Medications (more details below)
Yes, that’s right, your cup of red or black tea could be sabotaging your thyroid. Tea leaves accumulate fluoride from the soil and also from pollution. The longer they stay on the tea tree, the heavier the fluoride content, thus black tea has more fluoride compared to other teas. An article published in the journal Food and Chemical Toxicology reported that there can be up to 4.5, 1.8, and 0.5 mg/L of fluoride in black, green, and white teas, respectively, when brewed for five minutes.
In addition to the tea itself having a high fluoride content, the act of boiling water concentrates the fluoride instead of getting rid of it, contrary to what one might think. On the other hand, freezing the water does not affect the concentration of fluoride. Opting for white tea, chamomile, and herbal teas which contain less than 0.13mg/L of fluoride, or steeping your black tea for less than one minute, is one way to limit your fluoride exposure.
There are quite a few fluoride-containing medications. They include anesthetics, antacids, anti-anxiety medications, antibiotics, antidepressants, antifungals, antihistamines, cholesterol-lowering medications, anti-malarial medications, chemotherapy, appetite suppressants, arthritis medications, psychotropics, and steroids.
Some of the most commonly used brands of medications that contain fluoride include:
- Prozac®, Lexapro®, Celexa®, Paxil®: used for depression, anxiety, or OCD
- Prevacid®: used for acid reflux
- Diflucan®: an antifungal used for yeast infections
- Fluoroquinolone antibiotics (Cipro®, Levaquin®, Avelox®): used for UTIs and other infections
- Celebrex®: used for pain
- Lipitor®, Zetia®: used to lower cholesterol
For an extensive list, please visit the Fluoride Toxicity Research Collaborative.
The fluoride contained in most of these medications, however, is in an organic form, and it’s not known whether this type of fluoride can accumulate in our bodies, compared to the fluorides found in the dental industry which are inorganic fluorides and are known to accumulate in the body and cause toxicity. More research is needed in this area.
What Effect Does Fluoride Have on the Thyroid?
In your healing journey, have you ever considered that fluoride could possibly have a direct effect on your thyroid health? When I was digging for my root cause, fluoride toxicity did not get my attention right away, but I now know there are multiple ways in which fluoride can be detrimental to the thyroid gland and my overall health.
What will surprise many is that dental fluorosis, the term for hypomineralization of tooth enamel caused by excessive fluoride during enamel formation, is actually a result of thyroid function. In hypomineralization, teeth become more porous and susceptible to breaking, wearing down and decay.
Just like other halogens, fluoride has been proven to act as a trigger in inducing thyroid cell death, as well as lead to the development of thyroid inflammation and autoimmune thyroid disease like Hashimoto’s.
Furthermore, multiple studies have shown that fluoride is an endocrine disruptor, which means the body mistakes it as something else. It can actually alter the proper functioning of body processes. In the case of fluoride, it is recognized as iodine in the body. Because iodine is essential for every major body function on a cellular level, the body absorbs it into human organ tissues, all while mistaking it for iodine. Very little fluoride is excreted in urine or sweat, which leads to toxicity in the body. Over time, fluoride absorption in tissues manifests as actual lesions on endocrine glands, such as the thyroid.
A study in India examined children aged 8-15 years in a high-altitude district of India where the groundwater was contaminated with high levels of fluoride. The primary goal of the study was to determine the presence and severity of dental fluorosis, nutritional status, kidney health, and thyroid function. The results of the study revealed that dental fluorosis and urinary fluoride levels were significantly higher in affected children than the control area children. Additionally, the nutritional status of affected children was lower and chronic kidney damage was higher.
Thyroid function was also impacted by fluoride. Children in communities with high fluoride intake had a significant decrease in thyroid-stimulating hormone (TSH). Additionally, parathyroid hormone levels were found to be significantly higher in affected children.
Another fascinating study done in India analyzed the effect of fluoride toxicity on multiple generations. In this study, the researchers extensively studied fluoride’s effect on the brain as well as on the thyroid. They administered high-fluoride water to three generations of rats orally in order to study the fluoride-induced changes on their thyroid hormone status, their acetylcholinesterase (an enzyme that helps break down acetylcholine), levels of fluoride in their brain, as well as their learning and memory retention.
What they found was that a significant decrease in FT3 and FT4 serum levels were present in the fluoride-treated rats compared to the control group. This decrease was most significant in the third-generation rats. The presence of degenerating neurons was also observed, and once again, it was worst in the third-generation rats. The same was true of the rats’ learning and memory capabilities. So, fluoride can actually cause brain fog! A conclusion can also be made that those who have fluoride in their drinking water are at risk for developing hypothyroidism and increased brain fog, and their offspring are more likely to have developmental defects. Those are definitely a lot of issues those of us with Hashimoto’s want to avoid, along with everyone else.
And in one of the most recent studies on fluoride and human thyroid hormones that just came out of Iran, a group of people consuming fluoridated water were studied to see how fluoride impacted thyroid hormone levels. The major finding of this study is that TSH (thyroid stimulating hormone) values were higher in people who had higher fluoride concentration in their drinking water.
The Root Cause Rebels among us know that if you remove the trigger, you will see improvement in thyroid symptoms. Many of my clients have reported improvement in thyroid symptoms and thyroid function tests simply by removing fluoride from their daily intake.
The Effects of Fluoride in Communities
A 2015 British study reported that medical practices in a fluoridated area of the UK (West Midlands vs. those in a non-fluoridated area, Greater Manchester) were TWICE as likely to report a high prevalence rate of hypothyroidism in their patients. Furthermore, an analysis of different parts of the UK found that the rates of hypothyroidism were statistically matched to the rates of fluoride in the local water supply.
The article reported the following average rates of fluoride in fluoridated communities:
England 1.0 mg/L
Canada 0.7 mg/L
Southern Ireland 0.7 mg/L
United States 0.7- 1.3 mg/L
[One liter of water is equivalent to 33.8 ounces, or roughly 4.2 American cups].
The natural amounts of fluoride present in water should be 0.05 mg per liter, however, the amount in fluoridated water may be anywhere from 0.7- 1.3 mg/L, often expressed as “ppm” or parts per million. These high levels in fluoridated communities are a stark contrast to healthy levels.
Who is Likely to Have an Adverse Reaction to it and What are the Symptoms?
Fluoride toxicity has been widely studied because it has the potential to affect anyone, not just those of us who are already diagnosed with an autoimmune disease such as Hashimoto’s. Ingesting too much fluoride can cause damage to the thyroid gland and hypothyroid symptoms in an individual who was previously healthy. This includes children, men and women.
However, as I mentioned, there is research to support that fluoride toxicity increases with each generation, so if your mother had fluoride toxicity, it is likely you will be more susceptible, and your children even more so, and so on.
Acute oral exposure to high levels of fluoride may cause nausea, vomiting, abdominal pain, diarrhea, drowsiness, headaches, polyuria (excessive urination) and polydipsia (excessive thirst), coma, convulsions, cardiac arrest and even death.
Chronic excessive intake of fluoride can lead to many diseases such as osteoporosis, arthritis, cancer, infertility, brain damage, Alzheimer’s, autoimmune thyroid disease, DNA damage, gastrointestinal irritation, kidney dysfunction, calcification of teeth (known as dental fluorosis), and much more.
What Can be Done to Minimize Fluoride Exposure?
Now that you know where to find it and how it may harm you, you can focus on removing fluoride from your daily lifestyle. I’m sure you were surprised to learn where it might be lurking!
As I have mentioned, it is a good measure to check all your dental hygiene products and medications to see which ones might contain fluoride. There are plenty of safe, fluoride free brands that are quite popular and effective.
Here are some of my favorite, fluoride free toothpaste options:
- Nature’s Gate Natural Toothpaste – Natural ingredients, including peppermint oil and baking soda, plus an abundance of free calcium, a natural strengthening component of teeth that helps remove plaque, combine to gently and naturally clean teeth.
- Designs for Health Periobiotic Toothpaste – This one has the side benefit of including probiotics in it, and will help to balance the flora in your mouth. It may take some time to get used to using it correctly- you brush your teeth just like you would with regular toothpaste, but rather than rinsing your mouth when you’re done, you spit out most of it, but don’t rinse to allow the beneficial microbes to do their work.
Also, simply exchanging black and red tea for white tea or herbal tea may be helpful. This is yet another example of how making small lifestyle adjustments can result in big changes.
The next place you will want to focus will be your water supply. You can join the Fluoride Action Network, which is an advocacy organization dedicated to broadening the awareness of fluoride toxicity, to inform your authorities of the dangers of fluoride and be a voice against fluoridation. Occasionally, this organization will notify people of upcoming local initiatives focused on water fluoridation that will allow you to voice your opinion to policy makers on water fluoridation in your community. However, this is not the easiest or quickest way to get the fluoride out of your water.
Fluoride can certainly be taken out by filters—but not just any filters. Fluoride can only be removed by distilling the water, using reverse osmosis filtration systems, or by using activated alumina defluoridation filters. Most other types of filters do not remove the fluoride.
I researched filtration systems for a while, but many of them were extremely expensive. Some were in the thousands! Here are two of my favorites:
The most convenient and cost-effective reverse osmosis water filter that I have found is AquaTru’s countertop filter. I have one in my bathroom that I use on a daily basis. It’s super easy to set up (no plumber required!), and I feel better knowing that I have access to clean drinking water right in my bathroom. This is also a great option for those who rent or reside in places where you can’t adjust the plumbing. Plus, the wonderful people at AquaTru have been so generous to offer my readers $100 off! Those who know me well know that I cannot say enough good things about the AquaTru water filter.
Another option is having a plumber or handyman install an under the sink reverse osmosis unit. These typically cost around $200 and provide a consistent, daily source of water without fluoride. I recommend that you use the fluoride free water for cooking and drinking, for your family and pets.
If either of these options is too permanent for your lifestyle, keep in mind is that there are water delivery services that will deliver fluoride free water to your home or office.
Supplements that Can Help
While stopping your intake of fluoride is an excellent first step, you can also take additional measures to help your body counter the negative effects of excessive levels of fluoride.
Some old-school integrative professionals recommend using high-dose iodine for clearing halogens like fluoride from the body. Unfortunately, I’ve found that this method can be dangerous for people with Hashimoto’s. A recent study of the effects of fluoride combined with iodide on the thyroid gland showed that excessive fluoride and excessive iodide have detrimental effects on human thyroid cells, resulting in cytotoxicity – the death of the cell.
The following supplements are a safer way to support your body’s detoxification from fluoride:
Taurine is a sulfur-containing amino acid that is involved in a diverse array of biological and physiological functions, including bile salt conjugation, body fluid regulation, calcium modulation, anti-oxidation, and immune system regulation.
Recent studies have shown the ability of taurine to reverse both kidney and thyroid damage in rats that were chronically exposed to high levels of fluoride. Another study has shown taurine to reduce thyroid damage from exposure to lead and industrial insecticides. The beneficial effects of taurine may be attributed to its ability to protect the body from toxicity and oxidative stress. This is one of the reasons I’ve chosen to include Taurine in three of my Rootcology Liver Support supplements:
- Liver Reset contains a natural pea protein isolate to fuel natural detoxification pathways. It includes the nutrients needed to support and balance phase I and II metabolic pathways, high levels of antioxidants for safe detoxification and a comprehensive array of herbal hepatics and cholagogues to promote healthy liver function and elimination.
- Liver & Gallbladder Support is a comprehensive formula designed to support bile flow for the normal processing and elimination of toxins through the specific combination of nutrients and herbs in this formula. By supporting liver and gallbladder function, Liver & Gallbladder Support supports the elimination of fatty substances from the liver and the digestion and assimilation of fats and fat-soluble vitamins.
- Amino Support is useful for preparing the liver for phase II detoxification. It does not contain botanicals, minerals, or B vitamins that would also up-regulate phase I detoxification, which may result in intermediate metabolites that could cause sensitivity reactions. Providing nutritional support for phase II detoxification helps conjugate toxins and prepare them for safe elimination from the body.
GABA is a naturally occurring neurotransmitter that is known to produce calmness, as well as reduce tension and anxiety. Recently, GABA has also been shown to have the ability to protect against hypothyroidism caused by fluoride. A study that exposed mice to fluoride and subsequently treated them with GABA showed improved results for T4, T3 and thyroid hormone-binding globulin (TBG levels) along with healing of the structural abnormalities in thyroid follicles that were observed after fluoride exposure.
The GABA supplements that I recommend are:
- GABA by Pure Encapsulations promotes positive mood, supports relaxation and moderates occasional stress.
- GABA Calm by Source Naturals contains magnesium, GABA, glycine, n-acetyl l-tyrosine and taurine in a quick-dissolving lozenge form.
- PharmaGABA by Designs for Health is naturally-sourced, bioidentical GABA (gamma-aminobutyric acid). Its chewable tablet delivery allows for rapid and efficient absorption and assimilation. As a result, benefits are felt very quickly.
Resveratrol is a natural antioxidant. A recent study was performed on rats that were given high doses of fluoride and exhibited symptoms of thyroid dysfunction. Resveratrol supplementation in the fluoride-exposed rats appreciably prevented metabolic toxicity caused by the fluoride and restored functional status of the thyroid gland towards normalcy.
- Resveratrol by Pure Encapsulations is derived from one of the richest known sources, Polygonum cuspidatum, an herb utilized for centuries.
I Would Love to Hear your Experience with Fluoride!
Have you been using fluoride in your dental treatments for many years? Do you live in a fluoridated community? Have you considered getting a water filter that properly removes fluoride from your water supply?
While it’s important to stay informed on how much fluoride you are being exposed to, it’s encouraging to know that there are a lot of great action steps that you can take to protect yourself from excess fluoride. Installing a quality water filter, joining the Fluoride Action Network and finding lower fluoride sources of bottled water are all excellent places to start as you begin to create a safer environment for yourself and your thyroid health.
I wish you all the best on your healing journey!
To learn more about other toxins that may be compromising your thyroid health, pick up a copy of Hashimoto’s Protocol: A 90-Day Plan for Reversing Thyroid Symptoms and Getting Your Life Back and Hashimoto’s Thyroiditis: Lifestyle Interventions for Finding and Treating the Root Cause.
Be sure to sign up for my email list and weekly newsletter to get a free book chapter, recipes, Thyroid Diet Starter Guide, information about Rootcology supplements, and notifications about upcoming events and my latest research.
- Singh N, Verma K, Verma P, Sidhu G, Sachdeva S. A comparative study of fluoride ingestion levels, serum thyroid hormone & TSH level derangements, dental fluorosis status among school children from endemic and non-endemic fluorosis areas. SpringerPlus. 2014;3(1):7. doi:10.1186/2193-1801-3-7.
- Khandare AL, Gourineni SR, Validandi V. Dental fluorosis, nutritional status, kidney damage, and thyroid function along with bone metabolic indicators in school-going children living in fluoride-affected hilly areas of Doda district, Jammu and Kashmir, India. Environ Monit Assess. 2017;189(11):579. doi: 10.1007/s10661-017-6288-5.
- Basha P, Rai P, Begum S. Fluoride Toxicity and Status of Serum Thyroid Hormones, Brain Histopathology, and Learning Memory in Rats: A Multigenerational Assessment. Biological Trace Element Research. 2011;144(1-3):1083-1094. doi:10.1007/s12011-011-9137-3.
- Ghosh A, Mukherjee K, Ghosh S, Saha B. Sources and toxicity of fluoride in the environment. Research on Chemical Intermediates. 2012;39(7):2881-2915. doi:10.1007/s11164-012-0841-1.
- Peckham S, Lowery D, Spencer S. Are fluoride levels in drinking water associated with hypothyroidism prevalence in England? A large observational study of GP practice data and fluoride levels in drinking water. Journal of Epidemiology and Community Health. 2015;69(7):619-624. doi:10.1136/jech-2014-204971.
- Liu H, Zeng Q, Cui Y, Yu L, Zhao L, Hou C, et al. The effects and underlying mechanism of excessive iodide on excessive fluoride-induced thyroid cytotoxicity. Environ Toxicol Pharmacol. 2014;38(1):332-40. doi: 10.1016/j.etap.2014.06.008.
- Adedara IA, Ojuade TJD, Olabiyi BF, Idris UF, Onibiyo EM, Ajeigbe OF, et al. Taurine Ameliorates Renal Oxidative Damage and Thyroid Dysfunction in Rats Chronically Exposed to Fluoride. Biol Trace Elem Res. 2017;175(2):388-395. doi: 10.1007/s12011-016-0784-2.
- Yang H, Xing R, Liu S, Yu H, Li P. γ-Aminobutyric acid ameliorates fluoride-induced hypothyroidism in male Kunming mice. Life Sci. 2016;146:1-7. doi: 10.1016/j.lfs.2015.12.041.
- Sarkar C, Pal S. Ameliorative effect of resveratrol against fluoride-induced alteration of thyroid function in male wistar rats. Biol Trace Elem Res. 2014;162(1-3):278-87. doi: 10.1007/s12011-014-0108-3.
- Kheradpisheh Z, Mirzaei M, Mahvi AH, Mokhtari M, Azizi R, Fallahzadeh H, et al. Impact of Drinking Water Fluoride on Human Thyroid Hormones: A Case- Control Study. Scientific Reports. 2018;2674. doi:10.1038/s41598-018-20696-4.
Note: Originally published in April 2015, this article has been revised and updated for accuracy and thoroughness.