Antibiotic use is associated with breast cancer (archive bibliography).
Original statement
No Arabic original wording available.
Translation
Antibiotic use is associated with breast cancer (archive bibliography).
Origin
- Source status
- Archive editors
- Attribution
- Archive editors (eltayebat.com)
- Origin
- https://eltayebat.com/rule/antibiotic-overuse/
- Attribution uncertainty
- Archive bibliography only (A-ABX-17).
- Claimed mechanism
Immune/estrogen metabolism effects.
- Claimed health effect
Breast cancer.
- Population concerned
Women
- Geographic restriction by Elawady
none found
Scientific assessment
Unclear / insufficient evidence – The data do not allow an assessment either way.
Certainty of evidence: very low – Any assessment is very uncertain.
1. What was claimed?
Antibiotics and breast cancer.
2. What is demonstrably correct?
Velicer 2004 found a dose-related association (OR up to 2.14) (A-ABX-17).
3. What is wrong or exaggerated?
The authors wrote: 'It cannot be determined from this study whether antibiotic use is causally related to breast cancer'. No confirmatory evidence was reviewed here.
4. What remains unclear?
Causality.
5. Which studies support it?
6. Which studies contradict it?
A-ABX-17 (authors' caveat).
7. What applies to Germany and Europe?
Single US case-control study (A-ABX-17); no European data were reviewed.
8. What is known about Egypt?
No Egyptian data were reviewed.
9. What practical conclusion is appropriate?
Not a basis for decisions.
Assessment details
- Rationale for certainty of evidence
Single case-control study; authors themselves state causality cannot be determined; confounding by indication likely.
- Source quality
Archive lists the study without interpretation.
- Regional scope of the claim
- not specified
- Last reviewed
- 25 October 2026 provisional
In plain language
One study found that women who used more antibiotics were more often diagnosed with breast cancer. The authors said they could not tell whether antibiotics were the cause. This single finding is not enough to draw conclusions.
Studies on this claim
Studies supporting the claim (0)
No studies in this group.
Studies contradicting or limiting the claim (0)
No studies in this group.
Studies with mixed or unclear results (1)
-
Antibiotics and breast cancer
Velicer CM et al.. JAMA 2004 · PMID 14970061 · DOI 10.1001/jama.291.7.827Case-control studycited by the Tayebat archiveabstract only checkedMore antibiotic use was linked to breast cancer, but cause and effect could not be determined.
Does the study support the specific claim? Unclear · Methodological quality: low · 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.
- How many people, animals or samples were studied?
2266 cases.
- What was actually found?
Association.
- How large was the observed effect?
OR up to 2.14.
- What do the results mean in everyday life?
Not proof.
- What are the study's limitations?
Poor adjustment.
- What does it say about Elawady's specific claim?
Unclear.
- Do the results apply to Germany and Europe?
Moderate.
- What can explicitly not be concluded from this study?
Causation.
No study in this group is marked as key.
Regional context
Germany / EU
Single US case-control study (A-ABX-17); no European data were reviewed.
Egypt
No Egyptian data were reviewed.
What applies in my country?
General scientific assessment
Unclear / insufficient evidence Unclear: single association study, causality 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
- Antibiotic use in relation to the risk of breast cancer.. Velicer CM et al.. JAMA 2004 · PMID 14970061 · DOI 10.1001/jama.291.7.827