Too Much Fluoride: Prenatal Fluoride Consumption Linked to Lower IQ in Children

by | Sep 11, 2019 | Fluoride / Fluoridation

Every time more research confirms the trouble with fluoride, we hope it will continue to turn the tide against this potent neurotoxin being added to nearly 75% of America’s public water systems without informed consent

We can’t help it. From the limited effectiveness of topical fluoride, to fluoride’s harmful systemic effects, to the ways in which fluoride increases the amount of lead leaching from the plumbing of water supply systems, there are just so many reasons to shun the stuff.  

The latest bad news for fluoride comes courtesy of new research in JAMA Pediatrics, which looked at how fluoride exposure during pregnancy impacted the IQ scores of offspring.  

Researchers collected data from hundreds of pregnant women across Canada, some of whom lived in fluoridated communities, some of whom did not. When their children reached the age of 3 to 4, their intelligence was assessed. The results were sobering, to say the least. 

A 1-mg/L increase in [maternal urinary fluoride] was associated with a 4.49-point lower IQ score in boys, but there was no statistically significant association with IQ scores in girls. A 1-mg higher daily intake of fluoride among pregnant women was associated with a 3.66 lower IQ score in boys and girls.

In other words, the more fluoride the mother was exposed to, the more that IQ scores dropped. Scores were determined by a test called the Wechsler Preschool and Primary Scale of Intelligence (WPPSI), which is also the standard IQ test in America, and considered one of the most used and reliable assessments of IQ

Even a drop of 3 to 4 points is significant. It can be the difference between identifying a child as average instead of high average, or the difference between a child being identified as intellectually disabled instead of extremely low. 

The most troubling aspect of all? The fluoride-fueled results that the researchers documented are largely preventable. 

Nor is this the first indication that ingested fluoride can have a negative impact on intelligence. 

Higher fluoride exposure from drinking water has been associated with lower children’s intelligence in a meta-analysis of 27 epidemiologic studies and in studies including biomarkers of fluoride exposure.

Unsurprisingly, fluoride’s defenders have been criticizing the study – criticisms which Dr. Paul Connett has already powerfully addressed:

Indeed, there’s every good reason to stay fluoride-free. Your body doesn’t need it. Your teeth don’t require it. For any benefit it may confer, we believe the risks far outweigh it and so continue working to create a fluoride-free future. 

Print Friendly, PDF & Email

Comments Policy & Disclaimer

We welcome your comments and review all comments before letting them post. Any comments that include profanity, personal attacks, unfounded allegations or appear to be spam will not be approved. This is a moderated forum.

We regret that we cannot comment or offer advice on specific, personal dental health situations on this blog. Just give us a call at our office instead: (314) 997-2550. We’d be glad to speak with you.

This blog is for educational purposes only. It is not intended as a substitute for individual health, fitness or medical advice.



Skip to content