Jeffrey Salazar
Fluoride is a mineral that occurs naturally in water, soil, and many foods. It is most known for its role in preventing and reversing tooth decay, strengthening tooth enamel, and building strong teeth and bones. Fluoride is added to water supplies in some countries to help prevent tooth decay, but this practice is controversial. While fluoride is beneficial for oral health, excessive intake can lead to health issues, including dental fluorosis, skeletal fluorosis, and potential impacts on bones, teeth, and neurological development. The optimal level of fluoride is 0.7 parts per million, and it is recommended to consult a dentist to determine the appropriate level of fluoride for your needs.
| Characteristics | Values |
|---|---|
| Role | Fluoride is a mineral that occurs naturally in water and many foods. It helps to strengthen tooth enamel, reduce the risk of cavities, and build strong teeth and bones. |
| Daily Intake | The mean dietary intake is about 2 mg daily, including drinking water fluoridated at about 1 mg per liter. The optimal level of fluoride in drinking water is 0.7 parts per million. |
| Health Benefits | Fluoride helps prevent and reverse dental caries, strengthen teeth, and improve bone density. It is particularly beneficial for those with dry mouth, a history of tooth decay, or gum disease. |
| Risks | Excess fluoride accumulation in bones may increase the risk of fractures, especially in older adults. High fluoride intake is linked to regions with high levels of fluoride in drinking water. |
| Recommendations | The American Dental Association (ADA) recommends monitoring fluoride intake in infants and young children. Fluoride supplements should be avoided for children under 6 months, and fluoride toothpaste should not be used for infants under 2 years. |
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What You'll Learn
Fluoride prevents and reverses tooth decay
Fluoride is a mineral that occurs naturally in water and many foods. It is most recognised for its role in preventing and reversing dental caries (tooth decay) and building strong teeth and bones. Fluoride helps prevent tooth decay by making your enamel more resistant to acid attacks. It also reverses early decay.
Fluoride varnish, toothpaste, mouthwash, gels, foams, and rinses are all products that can be used to prevent and reverse tooth decay. Fluoride varnish is the only high-concentration fluoride formulation that can be used in children under six. It may be applied between two and four times per year, depending on the risk of caries. The United States Preventive Services Task Force (USPSTF) highly recommends that primary care clinicians apply fluoride varnish to the primary teeth of all infants and children starting at the age of primary tooth eruption. In the UK, fluoride varnish is advocated for children over the age of three who are at risk of caries.
The American Dental Association (ADA) recommends watching the intake of too much fluoride in infants and young children. The ADA specifically recommends avoiding reconstituted liquid formulas, such as liquid concentrate or powdered baby formulas that require mixing with water. The ADA also recommends that children under the age of six should not use fluoride mouth rinses unless recommended by a dentist or healthcare provider.
While fluoride can be harmful in large quantities, it is difficult to reach toxic levels due to the low amount of fluoride in over-the-counter products like toothpaste and mouth rinses. However, large amounts of fluoride can be toxic and result in fluoride-induced tooth discolouration (fluorosis). Fluorosis most often results from consuming naturally occurring fluoride, like that found in well water.
Community water fluoridation (CWF) is supported by every major health organisation, including the American Academy of Pediatrics (AAP), because it is an evidence-based method to protect teeth. Research has shown that water fluoridation reduces tooth decay by about 25% in children and adults.
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Fluoride is a mineral found in water and food
Fluoride is also present in various foods. It is found naturally in small amounts in a variety of food products. The specific dietary reference value (DRV) for healthy adults over the age of 18, including pregnant and lactating women, is between 2.9 and 3.4 mg of fluoride per day. This amount can typically be obtained through a balanced diet that includes a diverse range of foods. Additionally, oral hygiene products like toothpaste and mouthwash contribute to our daily fluoride intake.
The benefits of fluoride are well recognised in oral health. Fluoride strengthens tooth enamel, making teeth more resistant to decay and cavities. It acts in the saliva, creating a protective layer that shields teeth from the damaging effects of acids produced by oral bacteria and certain foods. This protective mechanism helps prevent and even reverse dental caries, commonly known as tooth decay.
While the focus is often on oral health, fluoride also plays a role in bone health. It improves bone density and hardness, making bones stronger and more stable. However, there are mixed findings regarding the impact of fluoride on bone health in adults. Some studies suggest a potential link between excess fluoride accumulation in bones and an increased risk of fractures, particularly in older adults. On the other hand, other research has found no association or even a protective effect of fluoride against fractures. Therefore, more large-scale studies are needed to conclusively determine the effects of long-term fluoride exposure on bone health.
In summary, fluoride is an essential mineral that should be included in our diets through water, food, and oral hygiene practices. It strengthens teeth and bones, contributing to overall health. However, it is important to be mindful of excessive fluoride intake, especially in children, to prevent potential negative side effects like dental fluorosis. Consulting with healthcare professionals and following country-specific dietary guidelines can help ensure adequate and safe fluoride consumption.
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Excess fluoride may cause health issues
Fluoride is a trace mineral that occurs naturally in water and many foods. It is most recognized for its role in preventing and reversing dental cavities, strengthening tooth enamel, and building strong teeth and bones. However, excess fluoride may cause health issues.
Excessive fluoride intake usually occurs through the consumption of groundwater naturally rich in fluoride, particularly in warm climates where water consumption is greater, or where high-fluoride water is used in food preparation or irrigation of crops. It is estimated that excessive fluoride concentrations in drinking water have caused tens of millions of dental and skeletal fluorosis cases worldwide. Excessive exposure to fluoride during childhood, when teeth are developing, can result in mild dental fluorosis, causing tiny white streaks or specks to appear in the tooth's enamel. While this does not affect the health of the teeth, the discoloration may be noticeable.
In adults, there is concern about the accumulation of excess fluoride in bones, which may increase the risk of fractures. A 2021 cohort study found higher rates of hip fractures when comparing the highest to lowest intakes of fluoride and urinary fluoride in postmenopausal women. However, the results of studies on fluoride intake and fracture risk have been mixed, with some studies finding no association or even a protective effect of fluoride.
Excessive fluoride exposure has also been linked to an increased risk of toxicity in individuals with kidney disease, as they may not be able to excrete excess fluoride effectively. Studies have shown that exposure to excessive fluoride can lead to the development of chronic kidney disease (CKD). However, it is important to note that these cases are typically associated with unusually high levels of fluoride in groundwater and are not seen with community fluoridated water.
Overall, while fluoride is beneficial for dental health and strengthening bones, excessive intake may lead to health issues such as dental fluorosis, skeletal fluorosis, and, in rare cases, increased risk of fractures and toxicity in individuals with kidney disease. It is important to monitor fluoride intake, especially in infants, young children, and individuals with kidney disease, to prevent potential negative health effects.
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Fluoride treatments for dental health
Fluoride is a mineral that naturally occurs in many foods and water. It is most recognized for its role in preventing and reversing dental caries and building strong teeth and bones. Fluoride helps prevent tooth decay by making the tooth more resistant to acid attacks from plaque bacteria and sugars in the mouth. It also helps in speeding up the process of remineralization, which is the process of gaining minerals such as fluoride, calcium and phosphate, through the consumption of food and water that contain these minerals.
Fluoride treatments are available for both children and adults. The American Dental Association (ADA) recommends getting a professional fluoride treatment at your dentist's office every 3, 6, or 12 months, depending on your oral health. If you are at a high risk of developing cavities, your dentist may prescribe a special fluoride rinse or gel for you to use regularly at home. Fluoride treatments can be in the form of foam, varnish or gel, which is either painted on the teeth or dispensed in a custom tray.
Developing teeth benefit from fluoride just as much as teeth that have already erupted. However, the ADA recommends watching the intake of fluoride in infants and young children. Children between the ages of 6 months and 16 years should be exposed to an appropriate amount of fluoride.
It is important to note that while fluoride is beneficial for dental health, large amounts of fluoride can be dangerous. Excess fluoride accumulation in bones may increase the risk of fractures. Additionally, people with kidney disease may not be able to excrete excess fluoride, increasing the risk of toxicity. Therefore, it is recommended to consult a dentist to determine the right amount of fluoride treatment for your specific needs.
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Fluoride supplements and products
Fluoride is a mineral that occurs naturally in many foods and water. It is recognised for its role in preventing and reversing tooth decay, strengthening tooth enamel, and building strong teeth and bones. While fluoride is required by the body, it is only needed in trace amounts.
- Toothpaste and mouthwash: Fluoride toothpaste and mouthwash are easily accessible over the counter. It is recommended that children under six years old use only a pea-sized amount of fluoridated toothpaste on their toothbrush to avoid swallowing it.
- Low-strength mouthwash: Low-strength fluoride mouthwash can be purchased without a prescription.
- Higher-concentration mouthwash, liquid, or tablets: Stronger concentrations of fluoride in liquid or tablet form require a prescription from a healthcare provider.
- Professionally applied treatments: Dentists can apply fluoride in the form of foam, varnish, or gel. These treatments are more concentrated than self-applied fluorides and are not needed as frequently. Varnishes, gels, foams, and mouth rinses may be professionally applied or available via prescription for home use.
- Silver diamine fluoride (SDF): SDF is a colourless liquid that is cleared for use in treating tooth sensitivity. It is classified as a Class II medical device by the FDA and must be professionally applied.
Precautions
While fluoride offers oral health benefits, it is important to be cautious about its use in certain situations. Excess fluoride accumulation in bones may increase the risk of fractures, although research results are mixed. Additionally, there is a potential risk of fluoride causing chronic kidney disease (CKD) in individuals exposed to excessive fluoride in groundwater. However, this risk is typically not associated with community fluoridated water but with local water that naturally contains excessive levels.
It is recommended to consult with a dentist, pediatrician, or healthcare provider for specific guidance on fluoride use, especially for children, to ensure safe and effective usage.
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Frequently asked questions
Fluoride is a mineral that occurs naturally in water and many foods. It helps prevent tooth decay by strengthening your tooth enamel and making it more resistant to acid attacks. It also helps to reverse early decay.
Fluoride is required by the body in only trace amounts. There is no Recommended Dietary Allowance for fluoride as nutritional requirements have not been established. However, adequate intakes (AI) have been established for adults aged 19 and above at 4 mg a day for men and 3 mg for women. The Tolerable Upper Intake Level (UL) for all adults aged 19 and above is 10 mg daily.
Excessive exposure to fluoride has been linked to a number of health issues. Possible side effects of excessive fluoride intake include dental fluorosis, skeletal fluorosis, and chronic kidney disease. There is also a concern about the accumulation of excess fluoride in bones, which may increase the risk of fractures. However, it is very difficult to reach toxic levels with properly fluoridated water and over-the-counter products that contain fluoride.
Fluoride is naturally present in water, soil, and many foods. It is also added to water supplies in some regions to help prevent tooth decay. Other sources of fluoride include tea, seafood with edible bones or shells, medicinal supplements, and fluoridated toothpastes and mouthwashes.
