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Higher Levels of 19 Potentially Toxic Chemicals Found in The Teeth of Children With Autism : ScienceAlert (opens in a new tab)

sciencealert.com · 2026-10-08

Short answerEvidenceSource

Short answer

Mixed

Mixed.

2 claims go further than the study. 2 other points were not covered by the paper.

  • 2 supported
  • 2 overstated
  • 2 not covered

Checked against the study summary. The full text wasn't available, so some details couldn't be settled either way.

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Follow the evidence trail
1
2

NewsLink checks it

Mixed

Two of six claims overstate the study. Two of six check out. Two claims the study doesn't address.

  • 2 supported
  • 2 overstated
  • 2 not covered
Open claim evidence
3
Then inspect each claim

Evidence layer

Claim by claim

Each claim gets a verdict. Expand it to see the evidence directly below.

6 claims in this story

Showing all 6 claimsChoose a verdict to focus the list.

Claim 1 of 6OverstatedAmong 60 compounds present in at least half the children, 39 were classified by the EPA as developmental or reproductive toxicants or endocrine-disrupting compounds.View evidenceHide evidence

As stated39 of 60 compounds

Why this verdict

The profile supports the core count that 39 of 60 detected compounds were described as known developmental toxicants or endocrine-disrupting compounds. However, the story’s framing adds that they were EPA-classified and includes reproductive toxicants; the abstract-level profile instead notes EPA developmental-toxicity data gaps for 21/60 compounds and says the databases/criteria for the 39/60 annotation are not specified. That makes the classification source/scope more definite than the supplied paper evidence supports.

1

Study evidence

Thirty-nine of the 60 compounds detected in shed baby teeth are reported as known developmental toxicants or endocrine-disrupting compounds.

“Thirty-nine of the 60 compounds detected are known developmental toxicants or endocrine￾disrupting compounds.”
Claim 2 of 6OverstatedThe researchers say the findings do not show that these chemicals cause autism and that the pilot study is small, but they argue the results warrant further research and precautionary avoidance of these chemicals, especially during pregnancy and early childhood.View evidenceHide evidence

Why this verdict

The supplied profile supports that the study is a small pilot observational case-control study and that the authors call for larger follow-up studies. A non-causal interpretation is also consistent with the observational design and limitations. However, the abstract-level profile does not support the added recommendation for precautionary avoidance of these chemicals, especially during pregnancy and early childhood, so that part goes beyond the supplied paper evidence.

1

Study evidence

Sixty compounds were detected in more than 50% of participants (n = 38); 57/60 (95%) were higher in autism cases than controls and 19/60 were statistically significantly elevated.57/60 higher in cases; 19/60 statistically significant

“We investigated cumulative pesticide and plasticizer exposures in shed baby teeth from children with and without autism”
2

Study evidence

Thirty-nine of the 60 compounds detected in shed baby teeth are reported as known developmental toxicants or endocrine-disrupting compounds.

“Thirty-nine of the 60 compounds detected are known developmental toxicants or endocrine￾disrupting compounds.”
Claim 3 of 6Not coveredIn a pilot study of 38 donated shed baby teeth, 22 from children with autism and 16 from controls, the researchers detected over 300 toxicants in each tooth sample on average.View evidenceHide evidence

As stated38 children; 22 autism cases; 16 controls; over 300 toxicants per tooth sample

Why this verdict

The abstract-level profile supports a pilot case-control study with n=38 children and shed baby teeth, but it does not provide the 22 autism/16 control breakdown. It also reports 60 compounds detected in more than half of participants, not an average of over 300 toxicants per tooth sample. That larger detection count may depend on full-text details not available at abstract depth.

1

Study evidence

Sixty compounds were detected in more than 50% of participants (n = 38); 57/60 (95%) were higher in autism cases than controls and 19/60 were statistically significantly elevated.57/60 higher in cases; 19/60 statistically significant

“We investigated cumulative pesticide and plasticizer exposures in shed baby teeth from children with and without autism”
2

Study evidence

A comprehensive targeted plus non-targeted GCxGC-TOFMS workflow was implemented on shed baby teeth to profile pesticides and plasticizers.

“using a comprehensive targeted and non-targeted analysis with two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GCxGC-TOFMS).”
Claim 4 of 6Not coveredOne chemical, benzyl benzoate, was reported at 722 percent higher concentration in the autism group than in controls.View evidenceHide evidence

As stated722 percent higher

Why this verdict

The abstract-level profile names benzyl benzoate as one of the compounds elevated in cases, but it does not provide the claimed 722% higher concentration or the statistical details for that specific compound. The magnitude is therefore not verifiable from the supplied abstract-depth profile.

1

Study evidence

Sixty compounds were detected in more than 50% of participants (n = 38); 57/60 (95%) were higher in autism cases than controls and 19/60 were statistically significantly elevated.57/60 higher in cases; 19/60 statistically significant

“We investigated cumulative pesticide and plasticizer exposures in shed baby teeth from children with and without autism”
2

Study evidence

Thirty-nine of the 60 compounds detected in shed baby teeth are reported as known developmental toxicants or endocrine-disrupting compounds.

“Thirty-nine of the 60 compounds detected are known developmental toxicants or endocrine￾disrupting compounds.”
Claim 5 of 6SupportedA new study published in Neurotoxicology and Teratology used children's primary teeth as a long-term record of chemical exposures.View evidenceHide evidence

Why this verdict

The abstract-level profile supports that the study used shed deciduous/baby teeth as biospecimens to capture cumulative exposures from roughly prenatal life through early childhood, and applied chemical analysis to those teeth. The journal venue itself is not independently checked here, but the scientific claim about teeth as a long-term exposure record is supported.

1

Study evidence

Sixty compounds were detected in more than 50% of participants (n = 38); 57/60 (95%) were higher in autism cases than controls and 19/60 were statistically significantly elevated.57/60 higher in cases; 19/60 statistically significant

“We investigated cumulative pesticide and plasticizer exposures in shed baby teeth from children with and without autism”
2

Study evidence

A comprehensive targeted plus non-targeted GCxGC-TOFMS workflow was implemented on shed baby teeth to profile pesticides and plasticizers.

“using a comprehensive targeted and non-targeted analysis with two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GCxGC-TOFMS).”
Claim 6 of 6SupportedThe story says 95 percent of the 60 compounds were found in higher concentrations in the teeth from children with autism, but only 19 differences were statistically significant.View evidenceHide evidence

As stated95 percent; 19 statistically significant differences

Why this verdict

The abstract-level profile directly reports that 57/60 compounds, or 95%, were higher in autism cases than controls, and that 19/60 were statistically significantly elevated.

1

Study evidence

Sixty compounds were detected in more than 50% of participants (n = 38); 57/60 (95%) were higher in autism cases than controls and 19/60 were statistically significantly elevated.57/60 higher in cases; 19/60 statistically significant

“We investigated cumulative pesticide and plasticizer exposures in shed baby teeth from children with and without autism”
Then look for missing context

Context layer

What the story left out

Important study details the story did not include.

  • Comprehensive targeted plus non-targeted GCxGC-TOFMS analytical workflow, with compound identification confirmed using standards and spectral library matches.

    The story conveys that teeth were analyzed for chemicals, but the supplied presentation does not reflect the paper’s specific analytical platform or confirmation approach, which is a secondary contribution of the paper.

    From GCxGC-TOFMS targeted + non-targeted chemical identification workflow (shed baby teeth)

  • Examples and source-related interpretation: elevated compounds included benzyl benzoate and organophosphate esters; five of the top nine differentiating compounds were reported to migrate from baby bottles.

    The story mentions benzyl benzoate, but the supplied presentation does not reflect the organophosphate ester examples or the baby-bottle migration/source-pattern interpretation reported in the abstract-level profile.

    From other

5 things the story did carry across
  • Pilot observational case-control design using shed baby teeth from children with and without autism, with n=38 total participants.
  • Use of shed deciduous teeth as a cumulative exposure archive spanning prenatal to early-childhood windows.
  • Main comparative result: among 60 compounds detected in more than half of participants, 57/60 were higher in autism cases and 19/60 were statistically significantly elevated.
  • Toxicological/regulatory annotation: 39/60 detected compounds were described as known developmental toxicants or endocrine-disrupting compounds; 21/60 lacked EPA developmental toxicity data.
  • Key limitations: small pilot sample and observational case-control design, so the findings do not establish causation.
Then read the study layer

Study layer

Study at a glance

Scan the study first. Expand only the parts you want to inspect.

Pieces of work

3

Evidence read

study summary

Lead result

human in vivo

1Lead resulthuman in vivoAssess whether cumulative exposures to pesticides and plasticizers (as captured in shed baby teeth across prenatal-to-early-childhood windows) differ between children with autism (cases) and children without autism (controls).pilot case-control observational study using shed deciduous teethExpand

In plain English

Pilot case-control study (n=38) comparing cumulative pesticide and plasticizer levels in shed baby teeth from children with autism versus controls using comprehensive targeted and non-targeted two-dimensional gas chromatography–time-of-flight mass spectrometry (GCxGC-TOFMS). Sixty compounds were detected in >50% of participants; 57/60 were higher in autism cases and 19/60 were reported as statistically significantly elevated. Thirty-nine of the 60 compounds are described as known developmental toxicants or endocrine-disrupting compounds; 21/60 lack EPA developmental toxicity data. Specific compounds elevated in cases included benzyl benzoate and organophosphate esters, and five of the top nine differentiating compounds were reported to migrate from baby bottles.

Key findings

  • Sixty compounds were detected in more than 50% of participants (n = 38); 57/60 (95%) were higher in autism cases than controls and 19/60 were statistically significantly elevated.57/60 higher in cases; 19/60 statistically significant
  • Thirty-nine of the 60 detected compounds are described as known developmental toxicants or endocrine-disrupting compounds; 21/60 compounds lack EPA developmental toxicity data.
“We investigated cumulative pesticide and plasticizer exposures in shed baby teeth from children with and without autism”
What this piece can’t prove
  • Abstract lacks details on statistical tests, confounder adjustment, effect size estimates for individual comparisons, and multiple-comparison correction.

2 further details could not be confirmed from the summary.

2ex vivo humanEstablish and apply a comprehensive targeted + non-targeted chemical analytic workflow (GCxGC-TOFMS with confirmation via standards/spectral libraries) to detect and identify pesticides/plasticizers in shed baby teeth.GCxGC-TOFMS targeted + non-targeted chemical identification workflow (shed baby teeth)Expand

In plain English

The paper reports a combined targeted and non-targeted analytical chemistry workflow using two-dimensional gas chromatography with time-of-flight mass spectrometry (GCxGC-TOFMS) applied to shed baby teeth. Compound identifications were confirmed using authentic standards and high-fidelity spectral library matches. The workflow detected 60 compounds present in >50% of participants (n = 38).

Key findings

  • A comprehensive targeted plus non-targeted GCxGC-TOFMS workflow was implemented on shed baby teeth to profile pesticides and plasticizers.
  • Compound identifications were reported as confirmed using authentic standards and high-fidelity spectral library matches.
“using a comprehensive targeted and non-targeted analysis with two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GCxGC-TOFMS).”
What this piece can’t prove

4 further details could not be confirmed from the summary.

3secondary dataAnnotate detected compounds for toxicological/regulatory relevance (e.g., developmental toxicants/endocrine disruptors; gaps in EPA developmental toxicity data) and describe notable source-related patterns (e.g., compounds migrating from baby bottles).otherExpand

In plain English

The paper annotated 60 compounds detected in >50% of shed baby teeth (n=38) for toxicological/regulatory relevance and reported that 39/60 are known developmental toxicants or endocrine-disrupting compounds, while 21/60 lack EPA developmental toxicity data. The authors interpret source-related patterns for several discriminating compounds (examples: benzyl benzoate; organophosphate esters), noting that five of the top nine compounds that differentiated autism cases from controls migrate from baby bottles and that some compounds are associated with flame retardants, baby products, PEX tubing, food contact materials, or skin-applied products. The abstract does not specify a reproducible annotation pipeline or the external data sources/databases used for the toxicological/regulatory classifications.

Key findings

  • Thirty-nine of the 60 compounds detected in shed baby teeth are reported as known developmental toxicants or endocrine-disrupting compounds.
  • Twenty-one of the 60 detected compounds lack EPA developmental toxicity data according to the authors.
“Thirty-nine of the 60 compounds detected are known developmental toxicants or endocrine￾disrupting compounds.”
What this piece can’t prove
  • The abstract does not detail the specific databases, criteria, or reproducible pipeline used for toxicological/regulatory annotation (developmental toxicant/EDC classification; EPA data checks).
  • Counts and labels reported depend on detection thresholds (compounds detected in >50% of participants) and on the authors' unspecified annotation methods.

2 further details could not be confirmed from the summary.

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Method layer

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Papers considered

The selected paper, plus nearby candidates.

PubMed, Europe PMC, Crossref · 15 candidate papers

Candidate

Multigenerational and Transgenerational Effects of Environmentally Relevant Concentrations of Endocrine Disruptors in an Estuarine Fish Model

Crossref

Source (opens in a new tab)

And 9 more candidates considered.