Nezam El-Tayebat Fact CheckA scientific assessment of the “نظام الطيبات” nutrition system
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Potentially true Certainty of evidence: low provisional C-ABX-07

Antibiotic exposure increases the risk of new-onset Crohn's disease (inflammatory bowel disease), nearly doubling it in children.

Conclusion: Plausible and consistent association; causation not established.
  1. Original statement
  2. Scientific assessment
  3. In plain language
  4. Studies on this claim
  5. Regional context
  6. What applies in my country?
  7. References

Original statement

ربط تحليل Ungaro عام 2014 المضادات بمضاعفة خطر مرض كرون لدى الأطفال

verbatim according to source. Translation by the project; the Arabic wording is authoritative.

Translation

Antibiotic exposure increases the risk of new-onset Crohn's disease (inflammatory bowel disease), nearly doubling it in children.

Origin

Source status
Archive editors
Attribution
Archive editors (eltayebat.com)
Origin
https://eltayebat.com/rule/antibiotic-overuse/
Attribution uncertainty
Archive editorial narrative and featured-study cards, written by the archive operators; study selection is the archive's, not necessarily Elawady's.
Claimed mechanism

Microbiome disruption.

Claimed health effect

Crohn's disease/IBD.

Population concerned

Children and adults

Geographic restriction by Elawady

none found

Scientific assessment

Potentially true – Some evidence points in favour of the statement, but it is not sufficient for a clear judgement.

Certainty of evidence: low – Further research is likely to change the assessment considerably.

1. What was claimed?

Antibiotics raise Crohn's/IBD risk.

2. What is demonstrably correct?

Ungaro meta-analysis: CD OR 1.74 (1.35-2.23); children OR 2.75 (1.72-4.38); UC not significant (A-ABX-07). UK children: anti-anaerobic antibiotics associated with IBD, aHR 5.51 before age 1 (A-ABX-08). Sweden (adults aged 16 and over): ever vs never antibiotics aOR 1.94 (1.85-2.03) for IBD; 3+ dispensations aOR 1.55 (1.49-1.61); sibling comparison aOR 1.35 (1.28-1.43) for 3+ dispensations (I-ABX-06).

3. What is wrong or exaggerated?

The archive summary wording 'near-doubling in children' is a reasonable reading of OR 2.75 for new-onset CD in children (this is more than doubling odds), but the large Swedish study concerns adults and does not support the children element. It is association, not proven causation; within families the excess odds were about 35%. The Ungaro meta-analysis included only 11 observational studies.

4. What remains unclear?

Causal mechanism in humans; magnitude of residual confounding.

5. Which studies support it?

A-ABX-07, A-ABX-08, I-ABX-06.

6. Which studies contradict it?

Partly limiting: in a Swedish sibling comparison the association was weaker (aOR 1.35 for 3+ dispensations versus aOR 1.94 for ever use; I-ABX-06), and reverse causation cannot be excluded.

7. What applies to Germany and Europe?

Swedish data are EU-relevant (I-ABX-06).

8. What is known about Egypt?

No Egyptian data were reviewed.

9. What practical conclusion is appropriate?

One more reason for stewardship; not a reason to withhold necessary antibiotics.

Assessment details

Rationale for certainty of evidence

Consistent observational associations with dose-response; a large Swedish study of adults found the association attenuated but persisting with sibling controls (aOR 1.35 for 3+ dispensations). The 'children' element rests on the Ungaro meta-analysis subgroup (OR 2.75) and a UK paediatric cohort. Reverse causation (early IBD symptoms treated with antibiotics) and confounding cannot be excluded.

Source quality

Meta-analysis of observational studies plus large cohorts.

Regional transferability

Moderate.

Regional scope of the claim
general (biological/medical)
Last reviewed
25 October 2026 provisional

In plain language

People who took more antibiotics were more often diagnosed later with Crohn's disease. The link also appeared when patients were compared with their own brothers and sisters, although it became weaker. This makes a real effect possible, but it is not proven, because early bowel symptoms may lead to antibiotic use before the diagnosis.

Studies on this claim

Studies supporting the claim (3)

  • Antibiotics and Crohn's disease (meta-analysis)

    Ungaro R et al.. Am J Gastroenterol 2014 · PMID 25223575 · DOI 10.1038/ajg.2014.246
    Meta-analysiscited by the Tayebat archiveabstract only checked★ key study

    Antibiotic exposure was linked to higher odds of Crohn's disease, especially in children.

    Does the study support the specific claim? Partly · Methodological quality: moderate · Certainty of evidence: see overall assessment of the claim

    Original publication · Scientific details

    Study explained simply
    What did the researchers want to find out?

    Pool studies.

    How was the study done?

    Meta-analysis.

    How many people, animals or samples were studied?

    11 studies.

    What was actually found?

    Higher CD odds.

    How large was the observed effect?

    OR 1.74; children 2.75.

    What do the results mean in everyday life?

    Association, not proof.

    What are the study's limitations?

    Observational.

    What does it say about Elawady's specific claim?

    Supports association.

    Do the results apply to Germany and Europe?

    Moderate.

    What can explicitly not be concluded from this study?

    Causation.

    Scientific details →

  • Childhood antibiotics and IBD (UK)

    Kronman MP et al.. Pediatrics 2012 · PMID 23008454 · DOI 10.1542/peds.2011-3886
    Cohort studycited by the Tayebat archiveabstract only checked

    IBD was more common after antianaerobic antibiotics, but absolute rates remained low.

    Does the study support the specific claim? Partly · Methodological quality: moderate · Certainty of evidence: see overall assessment of the claim

    Original publication · Scientific details

    Study explained simply
    What did the researchers want to find out?

    Link.

    How was the study done?

    Cohort.

    How many people, animals or samples were studied?

    1.07 million.

    What was actually found?

    Association.

    How large was the observed effect?

    1.52 vs 0.83/10,000 PY.

    What do the results mean in everyday life?

    Rare outcome.

    What are the study's limitations?

    Confounding.

    What does it say about Elawady's specific claim?

    Association.

    Do the results apply to Germany and Europe?

    High.

    What can explicitly not be concluded from this study?

    Causation.

    Scientific details →

  • Antibiotics and IBD in adults (Sweden)

    Nguyen LH et al.. Lancet Gastroenterol Hepatol 2020 · PMID 32818437 · DOI 10.1016/S2468-1253(20)30267-3
    Case-control studyindependent cross-checkfull text checked★ key study

    More antibiotic use was linked to IBD, also when compared with siblings.

    Does the study support the specific claim? Partly · Methodological quality: high · Certainty of evidence: see overall assessment of the claim

    Original publication · Scientific details

    Study explained simply
    What did the researchers want to find out?

    Link.

    How was the study done?

    Case-control with siblings.

    How many people, animals or samples were studied?

    23,982 adult IBD cases, 117,827 controls, 28,732 siblings (Sweden 2007-2016).

    What was actually found?

    More antibiotic prescriptions, especially broad-spectrum, were linked to higher odds of IBD: 3 or more vs none aOR 1.55 against the general population and 1.35 against siblings.

    How large was the observed effect?

    aOR 1.55 (>=3 dispensations); 1.35 vs siblings; ever vs never 1.94.

    What do the results mean in everyday life?

    Possible effect.

    What are the study's limitations?

    Observational; reason for antibiotics unknown; adults only; no absolute risks.

    What does it say about Elawady's specific claim?

    Supports association.

    Do the results apply to Germany and Europe?

    High.

    What can explicitly not be concluded from this study?

    Causation, absolute risk, or effects in children.

    Scientific details →

Studies contradicting or limiting the claim (0)

No studies in this group.

Studies with mixed or unclear results (0)

No studies in this group.

Regional context

Germany / EU

Swedish data are EU-relevant (I-ABX-06).

Egypt

No Egyptian data were reviewed.

What applies in my country?

General scientific assessment

Potentially true Plausible and consistent association; causation not established.

This statement concerns biological or medical relationships. The scientific assessment above applies regardless of the country; country-specific food data do not change it.

References

  1. Antibiotics associated with increased risk of new-onset Crohn's disease but not ulcerative colitis: a meta-analysis.. Ungaro R et al.. Am J Gastroenterol 2014 · PMID 25223575 · DOI 10.1038/ajg.2014.246
  2. Antibiotic exposure and IBD development among children: a population-based cohort study.. Kronman MP et al.. Pediatrics 2012 · PMID 23008454 · DOI 10.1542/peds.2011-3886
  3. Antibiotic use and the development of inflammatory bowel disease: a national case-control study in Sweden.. Nguyen LH et al.. Lancet Gastroenterol Hepatol 2020 · PMID 32818437 · DOI 10.1016/S2468-1253(20)30267-3

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