Does Fluoride During Pregnancy Affect Child’s IQ?
Matt Hannan, DDS
Updated: November 30, 2023
As a dentist, I’m often asked about the safety and effectiveness of fluoride use during pregnancy.
Recent research has explored the potential link between fluoride exposure during pregnancy and its effect on a child’s IQ.
In this blog post, we’ll explore the latest evidence on fluoride and IQ, and weigh the potential risks and benefits of fluoride use during pregnancy.Recommended Reading: Dental Fluoride | The Ultimate Guide
Does Fluoride During Pregnancy Affect a Child’s IQ?
The link between fluoride exposure during pregnancy and its effect on a child’s IQ is a subject of ongoing debate and research.
While some studies have suggested a potential link between high levels of fluoride exposure and lower IQ scores in children, other studies have found no significant association.
Therefore, the current evidence is inconclusive, and further research is needed to understand better the potential risks and benefits of fluoride use during pregnancy.
Pregnant women should consult their healthcare provider to make informed decisions about fluoride use.
The Science Behind Fluoride and IQ
The scientific community has conducted numerous studies to investigate the potential link between fluoride and IQ, with some studies finding a significant association and others finding no such link.
The Early Studies: Examining the Fluoride-IQ Link in Children
One of the most influential of these studies was conducted by Philippe Grandjean and colleagues in 2012, which analyzed data from a cohort of mother-child pairs in Mexico.
The study found that higher levels of fluoride exposure during pregnancy were associated with lower IQ scores in the children. The study has been highly cited and has prompted further research in this area.
Other Early Studies
- A 1995 study by Li and colleagues found a negative correlation between fluoride exposure and IQ scores in children in China.
- A 2003 study by Zhao and colleagues found a similar correlation in children in Inner Mongolia.
- A 2010 study by Choi and colleagues reported a decrease in IQ scores in children in China associated with higher levels of urinary fluoride.
While these early studies were not without limitations and have been subject to criticism, they helped to establish the Fluoride-IQ Debate. In addition, they generated interest in this topic among researchers and the public alike.Recommended Reading: Does Filtering Water Remove Fluoride? (2023 Update)
Recent Research: New Findings and Controversies
In addition to the early studies that first explored the Fluoride-IQ Debate, more recent research has contributed to our understanding of this issue.
One of the most prominent of these recent studies was conducted by Bashash and colleagues in 2017, which analyzed data from a cohort of mother-child pairs in Canada.
The study found a significant negative correlation between maternal urinary fluoride levels during pregnancy and IQ scores in the children.
However, the study has generated considerable controversy concerning its methodology and conclusions.
Other Recent Studies
- A 2020 study by Green and colleagues found no association between maternal fluoride exposure and cognitive outcomes in children in the UK.
- A 2019 study by Till and colleagues found a significant positive association between fluoride exposure and cognitive outcomes in children in Canada, contradicting the findings of the Bashash study.
- A 2018 review by the National Toxicology Program found “some evidence” of an association between fluoride exposure and cognitive development in animals. Still, it noted that the relevance of these findings to humans needed to be clarified.
While these recent studies have generated new findings and controversies, they have highlighted the complexities and challenges of studying the Fluoride-IQ Debate.
Further research is needed to understand better the potential risks and benefits of fluoride use during pregnancy and to clarify the conflicting results that have emerged from recent studies.Recommended Reading: Do Pur Filters Remove Fluoride? (2023 Update)
Understanding the Complexities: The Challenges of Studying Fluoride and IQ
Numerous factors can influence IQ scores, and it can be challenging to disentangle the effects of fluoride exposure from those of other factors.
- The Role of Other Factors: Other factors besides fluoride exposure can influence a child’s IQ, including genetics, nutrition, and environmental factors. It can be challenging to separate the effects of fluoride exposure from those of these other factors and to control for them in research studies.
- The Importance of Study Design: The design of research studies can also influence the results and conclusions of studies on fluoride and IQ. Study design challenges include selecting appropriate control groups, minimizing biases and confounding variables, and accurately measuring fluoride exposure levels.
- The Limitations of Existing Studies: Many of the studies on fluoride and IQ have been subject to criticism and limitations, including small sample sizes, inadequate control groups, and poor measurement of fluoride exposure levels. These limitations make it difficult to draw definitive conclusions about the link between fluoride exposure and IQ.
Risks & Benefits of Fluoride
We reviewed the potential benefits of fluoride in promoting dental health and preventing cavities and the potential risks of fluoride exposure, such as dental fluorosis, skeletal fluorosis, and neurotoxicity.
By understanding the risks and benefits of fluoride, pregnant women can make informed decisions about fluoride use and take steps to maintain good oral health while minimizing potential risks.
Fighting Tooth Decay and Promoting Dental Health
Fluoride has long been recognized as a critical tool in the fight against tooth decay and cavities. It strengthens tooth enamel and makes it more resistant to acid and deterioration.
- Reducing the Risk of Tooth Decay: Fluoride has been shown to reduce the risk of tooth decay and cavities, particularly in children and adolescents.
- Strengthening Tooth Enamel: Fluoride can strengthen tooth enamel and make it more resistant to acid and decay.
- Improving Oral Health: By reducing the risk of tooth decay and cavities, fluoride can help to improve overall oral health and prevent more serious dental problems.
Exploring the Health Concerns and Potential Side Effects
While fluoride use has numerous benefits for oral health, it is also important to be aware of fluoride exposure’s potential risks and side effects.
Key Health Concerns
- Dental Fluorosis: Dental fluorosis is a condition that can occur when children consume too much fluoride, particularly during the first eight years of life when teeth are developing. The condition causes white or brown spots on the teeth and can affect the appearance of the teeth. While dental fluorosis is not a serious health concern, it can be aesthetically unappealing.
- Skeletal Fluorosis: Skeletal fluorosis is a condition that can occur with high levels of fluoride exposure over a long period. The condition causes joint pain and stiffness and can lead to bone fractures and deformities.
- Neurotoxicity: There is some evidence that high levels of fluoride exposure may be associated with neurotoxicity and cognitive impairment. While the evidence is still inconclusive, this is an active research area.
The Decision to Use Fluoride During Pregnancy
It is important to assess the strength of the Fluoride-IQ link and to consider other factors that may influence this decision to make an informed decision about fluoride use during pregnancy.
- The Strength of the Fluoride-IQ Link: While evidence suggests a potential link between fluoride exposure and IQ, the evidence is still inconclusive and debatable. It is crucial to weigh the evidence for and against this link when deciding on fluoride use during pregnancy.
- The Risk of Dental Decay: Dental decay and cavities can be significant during pregnancy, as hormonal changes can increase the risk of oral health problems. Fluoride use can help to reduce this risk and promote good oral health.
- The Risk of Fluorosis: Dental fluorosis is another important factor to consider when deciding about fluoride use during pregnancy. The risk of fluorosis is generally regarded as low, but a variety of factors, including the type and amount of fluoride exposure, can influence it.
- Personal and Family History: The decision to use fluoride during pregnancy should also consider personal and family history of dental health problems, as well as individual preferences and values.
Current Guidelines and Recommendations
We reviewed the American Dental Association’s recommendations and the World Health Organization’s guidelines for fluoride intake.
What the American Dental Association Says About Fluoride and Pregnancy
The American Dental Association (ADA) provides guidance and recommendations for oral health care in the United States.
The ADA has issued specific recommendations regarding the use of fluoride during pregnancy based on the available evidence on this topic.
ADA’s Stance on Fluoride Use (Overview)
The ADA recommends that pregnant women use fluoride to prevent tooth decay and cavities as part of a comprehensive approach to oral health care.
- Fluoride is Safe: The ADA considers fluoride a safe and effective tool for preventing tooth decay and cavities, and the risks associated with fluoride exposure are generally regarded as low.
- Fluoride Use Should be Individualized: The decision to use fluoride during pregnancy should be based on individual needs and circumstances and should consider factors such as personal and family history of dental health problems, as well as individual preferences and values.
- Fluoride Use Should be Balanced: The benefits of fluoride use for oral health should be balanced against the potential risks and side effects of fluoride exposure, and fluoride use should be individualized to minimize these risks.
The Evidence Base for the ADA’s Guidelines: Reviewing the Research
The ADA’s guidelines on fluoride use during pregnancy are based on a review of the available evidence on this topic.
- Early Studies: The ADA acknowledges the earlier studies that suggested a potential link between fluoride exposure and IQ but noted that these studies have limitations and have been subject to criticism.
- Recent Research: The ADA recognizes the more recent research on fluoride and IQ but notes that the evidence is inconclusive and subject to debate.
- Benefits of Fluoride: The ADA highlights the benefits of fluoride use for oral health, and notes that these benefits can help to prevent more serious dental problems during pregnancy.
- Risks of Fluoride: The ADA acknowledges the potential risks and side effects of fluoride exposure but notes that the risks are generally considered low.
Understanding the World Health Organization’s Stance on Fluoride Intake
The World Health Organization (WHO) is a specialized agency of the United Nations responsible for international public health. The WHO provides guidance and recommendations on various health topics, including oral health and fluoride intake.
In this section, we’ll review the WHO’s global strategy on diet, physical activity, and health and its recommendations on fluoride intake.
WHO’s Global Strategy
The WHO’s global diet, physical activity, and health strategy is a comprehensive approach to improving public health through healthy eating and physical activity.
In addition, the process includes a focus on oral health and the prevention of dental caries and includes specific recommendations on the use of fluoride for this purpose.
WHO’s Recommendations on Fluoride
The WHO recommends using fluoride to prevent tooth decay and cavities and has set guidelines for its safe and effective use.
- The Optimal Fluoride Concentration: The WHO recommends drinking water containing between 0.5 and 1.5 milligrams of fluoride per liter, depending on the climate and the prevalence of dental caries in the population.
- The Importance of Monitoring Fluoride Intake: The WHO recommends that national authorities monitor fluoride intake from all sources, including water, food, and oral health products, to ensure that the optimal fluoride concentration is maintained and the risk of dental fluorosis is minimized.
- The Need for Individualized Care: The WHO recommends that oral health care be individualized to meet the needs and circumstances of each person.
Practical Tips for Pregnant Women
In addition to the strategies discussed throughout this blog post, there are some practical tips that pregnant women can use to promote oral health and reduce the risks of fluoride exposure.
Reducing Fluoride Exposure
For pregnant women who are concerned about the potential risks and side effects of fluoride exposure, there are steps that can be taken to reduce fluoride intake and limit exposure.
Different Water Sources
Drinking water is a significant source of fluoride exposure for most people, and pregnant women may wish to consider alternative water sources to reduce fluoride intake.
Pros & Cons
- Bottled Water: Bottled water can be a good option for pregnant women concerned about fluoride exposure, as many types of bottled water are low in fluoride. However, bottled water can be expensive and may not be a practical option for everyone.
- Filtered Water: Filtration systems can remove some or all of the fluoride from drinking water, depending on the type of filter used. However, filtration systems can be expensive and require regular maintenance.
- Distilled Water: Distilled water is a type of purified water that is free of fluoride, but it can be more expensive than other types of water and may not be practical for everyday use.
Understanding Which Foods and Beverages May Contain Fluoride
In addition to drinking water, there are other sources of fluoride that pregnant women may wish to be aware of.
- Tea: Tea is a significant source of fluoride, particularly for people who regularly consume large amounts of tea.
- Processed Foods and Beverages: Some processed foods and beverages may contain fluoride, including soda, juice, and canned or bottled foods and drinks.
- Fluoride Supplements: Some oral health products, including supplements, rinses, and gels, may contain fluoride and contribute to overall fluoride intake.
Alternative Strategies for Preventing Cavities and Tooth Decay
For pregnant women concerned about the potential risks and side effects of fluoride exposure, alternative strategies can be used to maintain good oral health and prevent cavities and tooth decay.
Keeping Teeth Clean Without Fluoride
Good oral hygiene is essential to maintaining dental health and preventing cavities and tooth decay.
- Brushing and Flossing: Regular brushing and flossing can help to remove plaque and food particles from teeth and prevent the buildup of bacteria that can lead to cavities.
- Regular Dental Cleanings: Routine dental visits and cleanings remove harmful bacteria that can lead to tooth decay and gum disease.
- Natural Toothpaste: Many natural kinds of toothpaste on the market do not contain fluoride and can be used to maintain dental health.
Other Techniques for Fighting Tooth Decay
In addition to good oral hygiene, other techniques can be used to prevent cavities and tooth decay without fluoride.
- Xylitol: Xylitol is a natural sweetener that can help to prevent the growth of bacteria in the mouth and reduce the risk of cavities.
- Sealants: Dental sealants are a protective coating that can be applied to the surface of teeth to prevent cavities.
- Diet and Nutrition: Eating a healthy diet and avoiding sugary or acidic foods and beverages can help to maintain dental health and prevent cavities.
Communicating With Your Healthcare Provider About Fluoride Use
If you are pregnant and considering fluoride for oral health, discussing your options with your healthcare provider is essential.
Your healthcare provider can help you understand the risks and benefits of fluoride use and can guide you on maintaining good oral health during pregnancy.
Questions to Ask Your Doctor
When discussing fluoride use with your healthcare provider, asking questions to ensure you have all the information you need to make an informed decision can be helpful.
- What are the benefits of fluoride use during pregnancy?
- What are the potential risks and side effects of fluoride exposure during pregnancy?
- Are there any alternatives to fluoride that can be used to maintain good oral health during pregnancy?
- How can I reduce my fluoride exposure if I use fluoride during pregnancy?
- What is your recommendation for my individual needs and circumstances?
Understanding Your Rights and Options as a Patient
As a patient, it is crucial to understand your rights and options when making decisions about your healthcare.
Informed consent is when healthcare providers explain the benefits, risks, and alternatives to a medical procedure or treatment and obtain the patient’s agreement to undergo the procedure or treatment.
Informed consent is an important aspect of healthcare that helps ensure that patients can make informed decisions about their health.
Frequently Asked Questions (FAQ)
Pregnant women should not necessarily avoid fluoride, but they should be aware of the potential risks and benefits and make an informed decision based on individual needs and circumstances. It is important to discuss fluoride use with a healthcare provider to determine the best approach.
What is the association between maternal fluoride exposure during pregnancy and IQ scores in children?
There is some evidence to suggest that maternal fluoride exposure during pregnancy may be associated with lower IQ scores in offspring. However, the evidence is not conclusive and there are conflicting results from different studies.
Fluoride exposure during pregnancy may have potential risks and side effects, including dental fluorosis, skeletal fluorosis, and neurotoxicity. However, the risks and benefits of fluoride use during pregnancy are still a topic of debate, and there is no consensus on the optimal level of fluoride intake during pregnancy.
Fluoride is a mineral that has been shown to be effective in promoting dental health and preventing cavities. However, there are potential risks and side effects to consider as well. The optimal level of fluoride intake and the risks and benefits of fluoride use are still a topic of debate, and it is important to discuss fluoride use with a healthcare provider to determine the best approach for individual needs and circumstances.
My Experience & Expertise
As a dental professional, I understand the importance of maintaining good oral health and preventing dental problems. Fluoride is an effective tool in promoting dental health and preventing cavities, but there are potential risks and side effects to consider as well.
When it comes to fluoride use during pregnancy, it is important to understand the risks and benefits and to make an informed decision based on individual needs and circumstances.
By incorporating good oral hygiene habits, limiting fluoride exposure where possible, and discussing options with a healthcare provider, pregnant women can help to maintain good oral health and reduce the risks of dental problems and fluoride exposure.
Knowledge is power when cultivating healthy dental habits. The more informed you are, the better positioned you’ll be to prevent avoidable and potentially costly dental procedures for you and your family. Watch for future blog posts, where we’ll continue sharing important information, product reviews and practical advice!
- Grandjean P. A Benchmark Dose Analysis for Maternal Pregnancy Urine-Fluoride and IQ in Children. Risk Anal. 2022.
- Tang QQ. Fluoride and children’s intelligence: a meta-analysis. Biol Trace Elem Res. 2008.
- Miranda. A systematic review and meta-analysis of the association between fluoride exposure and neurological disorders. Sci Rep. 2021.
- Wang. Arsenic and fluoride exposure in drinking water: children’s IQ and growth in Shanyin county, Shanxi province, China. Environ Health Perspect. 2007.
- Gopu BP. The Relationship between Fluoride Exposure and Cognitive Outcomes from Gestation to Adulthood-A Systematic Review. Int J Environ Res Public Health. 2022.
- Bashash M. Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6-12 Years of Age in Mexico. Environ Health Perspect. 2017.