Fluoride’s Neurotoxicity
The TSCA trial will provide evidence that fluoride is a developmental neurotoxicant at levels of exposure seen in the general population in water-fluoridated communities.
The following studies were online as of May 20, 2020.
Studies on Fluoride’s Effect on the Brain:
• 69 IQ studies (there were 52 IQ studies, reporting lower IQ due to fluoride exposure, published when the TSCA citizen petition was submitted in November 2016)
The above studies divided into categories:
• 260 studies on Cells & Tissues
• 249 studies on Cognitive Function
• 24 studies on Neurological Symptoms
Studies on fluoride’s effect on the human fetal brain
• He H, Cheng Z, Liu W. 1989. Effects of fluorine on the human fetus. Chinese Journal of Control of Endemic Diseases 1989;4(3):136-138. [English translation published in Fluoride 41(4):321–326. Translated by the Fluoride Action Network.)
• Du L, Wan C, Cao X, Liu J. 1992. The effect of fluorine on the developing human brain. Chinese Journal of Pathology 1992;21(4):218-20. [English translation published in Fluoride 2008;41(4):327–330 . Translated by the Fluoride Action Network.)
• Dong Z, Wan C, Liu J. 1993. Determination of the contents of amino-acid and monoamine neurotransmitters in fetal brains from a fluorosis-endemic area. Journal of Guiyang Medical College 18(4):241-45. (Translated by the Fluoride Action Network in 2012.)
• Yu Y, Wang W, Dong Z, et al. 1996. Neurotransmitter and receptor changes in the brains of fetuses from areas of endemic fluorosis. Chinese Journal of Endemiology 1996;15:257-259. [English translation published in Fluoride 2008;41(2):134–138.]
A snapshot of some of the studies.
2006: The National Research Council of the National Academies published Fluoride in Drinking Water: A Scientific Review of EPA’s Standards,1 the most authoritative review of fluoride’s toxicity. It stated unequivocally that “fluorides have the ability to interfere with the functions of the brain and the body (page 222).”
2012: A Harvard-funded meta-analysis2 found that children ingesting higher levels of fluoride tested an average 7 IQ points lower in 26 out of 27 studies. Most had higher fluoride concentrations than in U.S. water, but many had total exposures to fluoride no more than what millions of Americans receive.
“Fluoride seems to fit in with lead, mercury,
and other poisons that cause chemical brain drain.”2a
Philippe Grandjean, MD, PhD, Harvard study co-author, Danish National Board of Health
consultant, co-editor of Environmental Health, author of over 500 scientific papers
2017: A National Institutes of Health (NIH) – funded study3 in Mexico covering 13 years found that every one half milligram per liter (mg/L) increase in fluoride in pregnant women’s urine – approximately the difference caused by ingestion of fluoridated water4 – was associated with a reduction of their children’s IQ by about 3 points. Leonardo Trasande, a leading physician unaffiliated with the study, said it “raises serious concerns about fluoride supplementation in water.”5
2018: A Canadian study6 found iodine-deficient adults (nearly 18% of the population) with higher fluoride levels had a greater risk of hypothyroidism (known to be linked to lower IQs). Author Ashley Malin said “I have grave concerns about the health effects of fluoride exposure.”7
2019: Another NIH-funded study8 in JAMA Pediatrics found every 1 mg/L increase in fluoride in Canadian pregnant women’s urine was linked to a 4.5 decrease in IQ in their male children. The physician editor of JAMA Pediatrics said “I would not have my wife drink fluoridated water”9 if she was pregnant.
2019: A Canadian study10 found a nearly 300% higher risk of ADHD for children living in fluoridated areas.This reinforced earlier studies linking fluoride to ADHD in Mexico (2018)11 and the U.S. (2015).12
2019: Another NIH-funded study13 in Canada found that babies fed formula mixed with fluoridated water averaged 4 IQ points less than those mixed with non-fluoridated water. Losses of non-verbal IQ were even more serious, an average of 9 points.
2019: A systematic review of 149 human studies and 339 animal studies by the U.S. National Toxicology Program14 concluded that “fluoride is presumed to be a cognitive neurodevelopmental hazard to humans.” The report is still in draft form, but NTP also said there is little chance they will change their finding.
References
1. National Research Council. 2006. Fluoride in Drinking Water: A Scientific Review of EPA’s Standards. p. 222. The National Academies Press.
2. Choi AL, Sun G, Zhang Y, Grandjean P. 2012. Developmental Fluoride Neurotoxicity: A Systematic Review and Meta-Analysis. Environmental Health Perspectives, July 20.
2a. Grandjean quote. 2012. Impact of fluoride on neurological development in children. Featured news story, Harvard T.H. Chan School of Public Health. Sept.
3. Bashash M, Thomas D, Hu H, Martinez-Mier EA, Sanchez BN, Basu N, Peterson KE, Ettinger AS, Wright R, Zhang Z, Liu Y, Schnaas L, Mercado-García A, Téllez-Rojo MM, Hernández-Avila M. 2017. Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6-12 Years of Age in Mexico. Environmental Health Perspectives, Sept. 19.
4. Till C, Green R, Grundy JG, Hornung R, Neufeld R, Martinez-Mier A, Ayotte P, Muckle G, Lamphear B. 2018. Community Water Fluoridation and Urinary Fluoride Concentrations in a National Sample of Pregnant Women in Canada. Environmental Health Perspectives, Oct. 10.
5. Dovey D. 2017. Children’s IQ Could be Lowered by Mothers Drinking Tap Water While Pregnant. Newsweek, Sept. 19.
6. Malin AJ, Riddell J, McCague H, Till C. 2018. Fluoride Exposure and Thyroid Function Among Adults Living in Canada: Effect Modification by Iodine Status. Environment International, Dec;121(Pt 1):667-674.
7. Bienkowski B. 2018. We Add It to Drinking Water for Our Teeth – But is Fluoride Hurting Us? Environmental Health News, Oct. 10.
8. Green R, Lanphear B, Hornung R, Flora D, Martinez-Mier EA, Neufeld R, Ayotte P, Muckle G, Till C. 2019. Association Between Maternal Fluoride Exposure During Pregnancy and IQ Scores in Offspring in Canada. JAMA Pediatrics, Aug. 19.
9. Guarino B. 2019. Study Raises Questions About Fluoride and Children’s IQ. Washington Post, Aug. 20.
10. Riddell JK, Malin AJ, Flora D, McCague H, Till C. 2019. Association of Water Fluoride and Urinary Fluoride Concentrations with Attention Deficit Hyperactivity Disorder in Canadian Youth. Environment International, Dec;133, Part B, 105190.
11. Bashash M, Marchand M, Hu H, Till C, Martinex-Mier A, Sanchez BN, Basu N, Peterson KE, Green R, Schnaas L, Mercado-Garcia A, Hernandez-Avila M, Tellez-Rojo MM. 2018. Prenatal Fluoride Exposure and Attention Deficit Hyperactivity Disorder (ADHD) Symptoms in Children at 6-12 Years of Age in Mexico City. Environment International, Dec;121(1):658-666.
12. Malin AJ, Till C. 2015. Exposure to Fluoridated Water and Attention Deficit Hyperactivity Disorder Prevalence Among Children and Adolescents in the United States: An Ecological Association. Environmental Health, Feb.
13. Till C, Green R, Flora D, Hornung R, Martinez-Mier EA, Blazer M, Farmus L, Ayotte P, Muckle G, Lanphear B. 2020. Fluoride Exposure From Infant Formula and Child IQ in a Canadian Birth Cohort. Environment International, Jan. (originally issued online in Nov 2019).
14. Taylor K, Bucher J, Rooney A, Walker V, Wilson CJ, et al. 2019. Draft NTP Monograph on the Systematic Review of the Fluoride Exposure and Neurodevelopmental and Cognitive Health Effects. National Toxicology Program, Oct 22.
Print 
PDF
-
-
The Absurdities of Water Fluoridation
[caption id="attachment_10205" align="alignleft" width="190"] Paul Connett, PhD[/caption] Water fluoridation is a peculiarly American phenomenon. It started at a time when Asbestos lined our pipes, lead was added to gasoline, PCBs filled our transformers and DDT was deemed so "safe and effective" that officials felt no qualms spraying kids in school classrooms
-
Why I am now officially opposed to adding fluoride to drinking water
https://www.youtube.com/watch?v=iF-hKlIgCuM April, 2000 To whom it may concern: Since April of 1999, I have publicly decried the addition of fluoride, especially hydrofluosilicic acid, to drinking water for the purpose of preventing tooth decay. The following summarize my reasons. New evidence for lack of effectiveness of fluoridation in modern times. [caption id="attachment_10211" align="alignleft" width="150"] Dr. Hardy
-
50 Reasons to Oppose Fluoridation
Introduction [caption id="attachment_11821" align="alignleft" width="200"] Dr. Paul Connett[/caption] In Europe, only Ireland (73%), Poland (1%), Serbia (3%), Spain (11%), and the U.K. (11%) fluoridate any of their water. Most developed countries, including Japan and 97% of the western European population, do not consume fluoridated water. In the U.S., about 70% of public water supplies are
Related Articles:
-
-
-
Fluoride & IQ: 76 Studies
Note: See the Updated list of fluoride IQ studies at https://fluoridealert.org/researchers/fluoride-iq-studies/the-fluoride-iq-studies/ • As of July 18, 2022, a total of 85 human studies have investigated the relationship between fluoride and human intelligence. • Of these investigations, 76 studies have reported that elevated fluoride exposure is associated with reduced IQ in humans. • The studies
-
Fluoride's Effect on Fetal Brain
The human placenta does not prevent the passage of fluoride from a pregnant mother's bloodstream to the fetus. As a result, a fetus can be harmed by fluoride ingested pregnancy. Based on research from China, the fetal brain is one of the organs susceptible to fluoride poisoning. As highlighted by the excerpts
-
Fluoride: Developmental Neurotoxicity.
Developmental Neurotoxicity There has been a tremendous amount of research done on the association of exposure to fluoride with developmental neurotoxicity. There are over 60 studies reporting reduced IQ in children and several on the impaired learning/memory in animals. And there are studies which link fluoride to Attention Deficit Hyperactivity Disorder. Teaching
Related Studies:
-
-
-
Email Exchange with FDA re: Fluoride Supplements
Email exchange regarding FDA's reasons for not approving fluoride supplements.
-
Harvard's Statement on Chester Douglass/Scientific Misconduct
Statement Concerning the Outcome of the Review into Allegations of Research Misconduct Involving Fluoride Research BOSTON-August 15, 2006-The Harvard Medical School and School of Dental Medicine (HSDM) review of Chester Douglass, DMD, PhD, professor of oral health policy and epidemiology at HSDM, has concluded that Douglass did not intentionally omit, misrepresent,
-
The 'Altered Recommendations' of the 1983 Surgeon General's Panel
"We believe that EPA staff and managers should be called to testify, along with members of the 1983 Surgeon Generals panel and officials of the Department of Human Services, to explain how the original recommendations of the Surgeon Generals panel were altered to allow EPA to set otherwise unjustifiable drinking water standards for fluoride."
Related Miscellaneous Content:
-
