Environ Health Perspect September 2017 PMID 28937959

Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6-12 Years of Age in Mexico.

Morteza Bashash, Deena Thomas, Howard Hu, E Angeles Martinez-Mier, Brisa N Sanchez, Niladri Basu, Karen E Peterson, Adrienne S Ettinger, Robert Wright, Zhenzhen Zhang, Yun Liu, Lourdes Schnaas, Adriana Mercado-García, Martha María Téllez-Rojo, Mauricio Hernández-Avila

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Mentions

485

Peak: 20 in Nov 2024

across 7 sources since Nov 2018

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1,223,126

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AI synopsis

What people are saying

Several discussions highlight concerns about fluoride's effects, with users mentioning that higher prenatal fluoride exposure correlates with lower IQ scores in children, which aligns with the findings from the Bashash study. Phrases like 'fluoride makes you dumb' and declarations of it being a 'neurotoxin' emphasize the urgency and seriousness with which participants view the study. This choice of language and tone illustrates a deep worry about child development and public health policy, rallying for further examination and caution against fluoride exposure.

AgreementModerate agreement

While there are some dissenting views, a majority of the discussions express support for the study's findings on fluoride's potential impact on cognitive development.

InterestHigh interest

The topic garners significant curiosity, as many users share their concerns and seek to understand the implications of the findings.

EngagementModerate engagement

Participants reference various studies and delve into specifics, showing a moderate level of engagement with the material rather than dismissing it outright.

ImpactHigh impact

The general consensus points to a belief that the findings could have serious implications for public health and policy regarding fluoride exposure.

Abstract in brief

Study aimed to investigate how prenatal fluoride exposure affects cognitive development in children at ages 4 and 612 in Mexico.
The researchers measured fluoride levels in urine samples from mothers during pregnancy and their children at specific ages, using established intelligence assessments to evaluate cognitive outcomes.
Results indicated that higher fluoride exposure in mothers correlated with significantly lower cognitive scores in their children, suggesting potential neurotoxic effects linked to prenatal fluoride exposure.

Read the full abstract

All mentions

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loverofh2o.bsky.social

@loverofh2o.bsky.social · Bluesky

You're cherry-picking for Arcora. The 2017 NIH-funded Mexico study (pubmed.ncbi.nlm.nih.gov/28937959) found IQ loss at fluoride levels equal to U.S. water fluoridation. After the EPA lawsuit win+NTP report, your side scrambled for a "Merchant of Doubt"-cue Unbiased Science. Industry PR, not science.

Aug 1, 2025 · 1 like View post →

Edmond Jones

@EdmondJ60650318 · X

@JulietGuichon And another. If there is even the slightest doubt, our kids should not be "drinking fluoride. Some kids drink 10 times as much as others, hot climate, or exercise. How much fluoride? "You can always fix their teeth, you cant fix the brain" Source: https://t.co/rTgboXELEO https://t.co/x7bIXKKDxg

Feb 26, 2025 · 115 followers View post →

Fluoride Free Great Britain and Ireland

@Terence28387564 · X

RT @jgpatriotmedia: Fluoride in drinking water: neurotoxin concerns? Studies link higher levels to lower IQ in kids. Canada (Till, 2018): 3…

Feb 25, 2025 View post →

Patriot Media

@jgpatriotmedia · X

Fluoride in drinking water: neurotoxin concerns? Studies link higher levels to lower IQ in kids. Canada (Till, 2018): 3.15 IQ drop per 1 mg/L. Mexico (Bashash, 2017): 2.4 IQ drop per 0.5 mg/L prenatal exposure. [https://t.co/dSIqvD3qpD] [https://t.co/XsyfYFlyTG]

Feb 24, 2025 · 1 like · 1,070 followers View post →

Cléia Gerin

@cleia_gerin · X

RT @fiscaldofim: Se você gostou da Thread, ajude a divulgar. Curta

Feb 3, 2025 · 2 shares · 591 followers View post →

Vanusa Valentino

@ValentinoVanusa · X

RT @fiscaldofim: Se você gostou da Thread, ajude a divulgar. Curta

Feb 3, 2025 · 2 shares · 1,706 followers View post →

Fiscal do Fim dos Tempos

@fiscaldofim · X

Se você gostou da Thread, ajude a divulgar. Curta

Feb 2, 2025 · 38 likes · 2 shares · 64,761 followers View post →

Jason R. Epstein, Esq.

@Maluminse · X

Bashash et al., 2017." This study, titled "Prenatal fluoride exposure and cognitive outcomes in children at 4 and 6–12 years of age in Mexico," was published in the journal Environmental Health Perspectives. https://t.co/O5pegPC4d2

Jan 20, 2025 · 1,851 followers View post →

Shelly Chadwick

@ShellyChad61480 · X

Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6–12 Years of Age in Mexico | Environmental Health Perspectives | Vol. 125, No. 9 https://t.co/cSQZ20AByf

Dec 26, 2024 · 51 followers View post →

airlesstermite

@airlesstermite · X

https://t.co/WZC5AexNez https://t.co/03z5mMZwxe

Dec 13, 2024 · 17 followers View post →

Debbie_in_WI

@Debbie_in_WI · X

@FLSurgeonGen You're a quack. None of the attached studies found any statistically significant correlation between fluoridation of water and any variable relating to cognition or IQ. https://t.co/tceAFO4Aus

Nov 26, 2024 · 20,160 followers View post →

Bryan Adams, PhD

@lotusctr · X

@JamesSurowiecki https://t.co/zbixNTvDYe

Nov 25, 2024 · 3,487 followers View post →

Anonymous

@Anonymo74369551 · X

@AlastairMcA30 https://t.co/HGaSWdFP1k

Nov 24, 2024 · 39 followers View post →

Metin Cakir

@metin__cakir · X

Yine isinize gelen bir arastirmadan mi ögrendiniz? 1.https://t.co/gy7Erpwarm 2.https://t.co/8762S8QH4D 3.https://t.co/ThsiKXNfGE 4.https://t.co/4kA4LCOAbF https://t.co/vBamO9siCJ

Nov 24, 2024 · 1 like · 711 followers View post →

BagDit

@TeaSca3213 · X

https://t.co/r23pXACZ4T

Nov 24, 2024 · 104 followers View post →

Amanda J

@AmandaJ4Freedom · X

@AlastairMcA30 https://t.co/FktKxkghKu https://t.co/pg01dbd5q4

Nov 24, 2024 · 11 likes · 1,583 followers View post →

Yore Friend Whig

@WhigJust · X

@JustEric @Heminator There is actually no lack of academic literature showing increased intake of fluoride having negative effects on IQ. https://t.co/hB7fQJwryX

Nov 24, 2024 · 5 likes · 1,679 followers View post →

Schottelkotte

@Schottelko52891 · X

@AlastairMcA30 "was associated with lower scores on tests of cognitive function in the offspring at age 4 and 6–12 y" https://t.co/pR7sopJOp0

Nov 24, 2024 · 311 followers View post →

Tsuga mertensiana

@DesmondTsuga · X

@TotalDesolation @sciencebamf @FLSurgeonGen There isn't. This is from the link that fraud shared. Read it. https://t.co/gsstddbzfg https://t.co/Vud9ockTo9

Nov 24, 2024 · 2 likes · 907 followers View post →

Stephanie ☮️

@madamx12369 · X

@DavidJuurlink https://t.co/Htd8atOS9P

Nov 23, 2024 · 2,053 followers View post →

Xochilt Rodriguez,

@XochiltRodrigez · X

Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6–12 Years of Age in Mexico | Environmental Health Perspectives | Vol. 125, No. 9 https://t.co/hdH9Xb0ufo

Nov 22, 2024 · 2,735 followers View post →

Koziswellness

@koziswellness · X

Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6-12 Years of Age in Mexico Morteza Bashash et al. Environ Health Perspect.2017. https://t.co/9FQvE1N3yk

Nov 21, 2024 · 4 likes · 1 share · 2,928 followers View post →

Adrién Bartko

@AdrienBartko · X

@CappyDick @MitchKumsteighn @DianePostLester @ValentinaForUSA @RobertKennedyJr @realDonaldTrump you linked 2019 one, not the 2023. also: https://t.co/qwwmdxvjuX

Nov 16, 2024 · 14 followers View post →

VedMed83

@medved1368 · X

@T33K3SS3LCH3N @mattindctweets @OffGuardian0 @MichaelAlbertMD https://t.co/RjTPOpY2kt

Nov 9, 2024 · 11 followers View post →

VedMed83

@medved1368 · X

RT @kevinstock12: BRAIN The Bashash Study, found that mother’s drinking 1 ppm fluoride had children with IQ points 5 to 6 points lower tha…

Nov 9, 2024 · 6 shares · 11 followers View post →

Josue 915

@Josue9156325 · X

Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6–12 Years of Age in Mexico | Environmental Health Perspectives | Vol. 125, No. 9 https://t.co/yqxuqifbvf @RepEscobar How about this? Straight from the NIH website.

Nov 7, 2024 · 16 followers View post →

Jon Baker, PharmD

@JonBakerPharmD · X

@janedivine124 @blakebenson42 @mattyglesias https://t.co/V62MaNkSVO

Nov 7, 2024 · 1,358 followers View post →

Grant♟️

@granawkins · X

takeaways: 1. the NSF has no data on the safety of fluoride in water or its effect on IQ. 2. the EPA suggested updating the fluoride assessment based on the study "Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6-12 Years of Age in Mexico". https://t.co/DCZhawHAxQ

Nov 3, 2024 · 2 likes · 9,686 followers View post →

Michael Puscar

@michaelapuscar · X

@TobiasIlskov @RobertKennedyJr That was actually a followup study to this one, here is the original: https://t.co/jxtu8itWje

Nov 2, 2024 · 255 followers View post →

Jon Baker, PharmD

@JonBakerPharmD · X

@GracchiSimp @mattyglesias https://t.co/V62MaNlqLm

Nov 2, 2024 · 1 like · 1,358 followers View post →

Manatea ariitai

@Manatea77167522 · X

@silvano_trotta 4) toxiques pour l'adulte... Une autre étude sur des enfants au Mexique en 2017 confirmait encore que le fluor baisse le QI...https://t.co/g80zFTLtEj; en 2019, une "seconde" étude du gouvernemenrt américain le confirme une fois de plus.. https://t.co/H0eQyOaVmz ;

Oct 9, 2024 · 3 likes · 319 followers View post →

Aaron Heikkila

@AaronHeikkila · X

@EnithTea @MattB_M2M Another study - https://t.co/VR83yO13tE

Sep 8, 2024 · 478 followers View post →

SHiRErEeVE ☧

@SHiRErEeVE2 · X

@Calum_Gettum @RightWingCope https://t.co/fkpS2n2HGh

Sep 7, 2024 · 147 followers View post →

E. Gizem

@EGizemK_ · X

2. https://t.co/vpvdKhXhAL

Sep 6, 2024 · 321 followers View post →

Meta

@Meta27330359 · X

@DudeeeeeeNick @starlordsoze @AdamtheGiraffe @stylezovbeyond @HASHEDAEE @NerdAtCoolTable "In this study, higher prenatal fluoride exposure...was associated with lower scores on tests of cognitive function in the offspring at age 4 and 6–12 y." https://t.co/BSaRNG6t0P

Nov 12, 2022 · 4 likes · 104 followers View post →

For health-promoting environments

@SilkeLeFay · X

@NYTHealth . Fluoride is neurotoxic and enterotoxic and increase uterine cancer mortality. https://t.co/caTN3qaDj0 . https://t.co/X9RB850Gc3 . https://t.co/GFOD6RYVyF . https://t.co/mXQYa5RnXX . https://t.co/6uoGQJkWOU . https://t.co/i9CLLrt1pl . https://t.co/YhMST6UCWP

Oct 29, 2022 · 4,584 followers View post →

Gaming Bot

@precisionmedbot · X

RT @SilkeLeFay: #pediatrics #obstetrics #neurology #neuroscience #neuropsychiatry #education #chemistry #biology #globalhealth Higher pre…

Oct 13, 2022 · 1 share · 1,151 followers View post →

For health-promoting environments

@SilkeLeFay · X

#pediatrics #obstetrics #neurology #neuroscience #neuropsychiatry #education #chemistry #biology #globalhealth Higher prenatal fluoride exposure was associated with lower scores on tests of cognitive function in the offspring at age 4 and 6–12 y. . https://t.co/GFOD6RYVyF

Oct 13, 2022 · 1 share · 4,584 followers View post →

Kane Titchener

@KaneTitchener · X

RT @DeclanWaugh: @Joanode @karen_keely @simoncoveney @AnneRabbitte @Noeline_B @Jeannelight @NWCI @DisabilityFed I agree, AND mothers and ch…

Aug 29, 2022 · 3 shares · 201 followers View post →

nyscof

@nyscof · X

RT @DeclanWaugh: @Joanode @karen_keely @simoncoveney @AnneRabbitte @Noeline_B @Jeannelight @NWCI @DisabilityFed I agree, AND mothers and ch…

Aug 29, 2022 · 3 shares · 1,243 followers View post →

Beverly Dunne

@DunneBeverly · X

RT @DeclanWaugh: @Joanode @karen_keely @simoncoveney @AnneRabbitte @Noeline_B @Jeannelight @NWCI @DisabilityFed I agree, AND mothers and ch…

Aug 29, 2022 · 3 shares · 45 followers View post →

Declan Waugh

@DeclanWaugh · X

@Joanode @karen_keely @simoncoveney @AnneRabbitte @Noeline_B @Jeannelight @NWCI @DisabilityFed I agree, AND mothers and children also deserve robust inquiry into how prenatal exposure to fluoride is association with developmental disabilities. https://t.co/XDXtitPInE https://t.co/TfgRHYc724 https://t.co/YmeaO1GvSb https://t.co/eie0nZrHLe https://t.co/N8jhkyWy98

Aug 28, 2022 · 5 likes · 3 shares · 1,359 followers View post →

* ( ) *

@frontbuttcity · X

@xpatriciah Ummm. Fluoride reduces cognitive function. Before you marginalize a group you should actually know what you are talking about. Here is one study for you to read up on. https://t.co/lEcDzrQDjW

Jul 14, 2022 · 227 followers View post →

Clark

@ConsciousClark_ · X

@NeilB1974 @biwak16330807 @conspiracyb0t Correct it’s Poisonous, so it shouldn’t be consumed in any amounts whatsoever ur the nutter‼️Studies show it dumbs down cognitive function & IQ scores https://t.co/j3RMs8ku1D & if u don’t agree w/ me then argue with this actual DENTIST Dr. Mark Burhenne who knows it’s harmful

May 24, 2022 · 1 like · 94 followers View post →

LionGlass

@TheLionGlass · X

If you are pregnant, please consider changing to fluoride free toothpaste Prenatal exposure to fluoride makes your children less intelligent https://t.co/G1RJeX1BrD

Apr 27, 2022 · 2 likes · 13,064 followers View post →

Veronica Teodorof

@VTeodorof · X

RT @RightsDefending: @inappropedave https://t.co/8LDsHMS88H

Apr 27, 2022 · 1 share · 936 followers View post →

Defending Rights

@RightsDefending · X

@inappropedave https://t.co/8LDsHMS88H

Apr 25, 2022 · 1 like · 1 share · 3,532 followers View post →

Defending Rights

@RightsDefending · X

@BBCNews https://t.co/8LDsHMS88H

Apr 25, 2022 · 3,532 followers View post →

سمو

@Hammad65443874 · X

RT @modhi_shammari: بحث يوجد علاقه بين الفلورايد و انخفاض نسبه الذكاء عند الاطفال. https://t.co/lii3pNamHe

Mar 30, 2022 · 4 shares View post →

@Allen_Estrada · X

RT @realalejandroAD: Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6-12 Years of Age in Mexico Fluoride makes u d…

Nov 17, 2021 · 7 shares · 107 followers View post →

hardy limeback

@DrLimeback · X

@GalanteMD @_CarolinaMaria_ @DracoLib Studies: kids' brains harmed by fluoridation. Read the papers before you vote #yyc You'll vote no. 1)https://t.co/LsABTbSncK 2)https://t.co/kw0m90P2Fa 3)https://t.co/bL753mhbcv 4)https://t.co/WHYwnjN9xS 5)https://t.co/dIx6pjVoop 6)https://t.co/XdtFdzZpOa 7)https://t.co/dxX8599is0 https://t.co/R9QjCyn3UO

Oct 17, 2021 · 1,530 followers View post →

Vicci Wright

@Vicciwright · X

@sajidjavid https://t.co/FDM6BNPFzJ

Sep 26, 2021 · 100 followers View post →

POH

@POH_Smiles · X

"Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6–12 Years of Age in Mexico" https://t.co/yZRXdmqOa3

Aug 27, 2021 · 434 followers View post →

MSoF

@MSoFluoride · X

RT @OpenParachute: My post-publication peer review of Bashash et al (2017). "Prenatal Fluoride Exposure and Cognitive Outcomes in Children…

Aug 15, 2021 · 1 share · 223 followers View post →

Ken Perrott

@OpenParachute · X

My post-publication peer review of Bashash et al (2017). "Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6–12 Years of Age in Mexico" @ResearchGate: https://t.co/aDpT37oCyI

Aug 14, 2021 · 3 likes · 1 share · 1,473 followers View post →

J. Z.

@russianbot3392 · X

RT @realalejandroAD: @OneJKMolina Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6-12 Years of Age in Mexico Fluor…

Aug 5, 2021 · 1 share · 826 followers View post →

Alejandro A.D.

@realalejandroAD · X

@OneJKMolina Prenatal Fluoride Exposure and Cognitive Outcomes in Children at 4 and 6-12 Years of Age in Mexico Fluoride makes u dumb https://t.co/wGXtSFjpm3

Aug 5, 2021 · 16 likes · 1 share · 15,498 followers View post →

Azmi

@michimotagechi · X