Risk assessmentindependent cross-checkabstract checked I-EGG-122 standard review
Iranian supermarket eggs: lead and cadmium below safe limits
Risk assessment of lead and cadmium concentrations in hen's eggs using Monte Carlo simulations.
Overview
Hoseini H et al.. Food Sci Nutr 2023 · PMID 37324917 · DOI 10.1002/fsn3.3268
Lead and cadmium in eggs from 17 brands were below permitted levels; no health risk was estimated.
Does the study support the specific claim? No · Methodological quality: moderate
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Assess metal risk from eggs.
- How was the study done?
Lab analysis plus Monte Carlo risk model.
- How many people, animals or samples were studied?
42 eggs, 17 brands.
- What was actually found?
Levels below limits; no risk.
- How large was the observed effect?
THQ < 1.
- What do the results mean in everyday life?
Store-bought eggs were not a meaningful source of lead or cadmium.
- What are the study's limitations?
Small sample.
- What does it say about Elawady's specific claim?
Contradicts it.
- Do the results apply to Germany and Europe?
Moderate.
- What can explicitly not be concluded from this study?
It cannot speak for polluted local areas.
Scientific in-depth review
1. Full reference
- Authors
- Hoseini H et al.
- Journal
- Food Sci Nutr
- Year
- 2023
- Identifier
- PMID 37324917 DOI 10.1002/fsn3.3268
- Verification
- verified – PubMed efetch 2026-10-26; Crossref works API 2026-10-26
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
No conflicts declared; funding not stated in abstract.
2. Research question
What are Pb and Cd levels in commercial hen eggs in Iran and what risk do they pose?
3. Study design and population
- Study design
- Risk assessment – Exposure measurement with probabilistic (Monte Carlo) risk assessment
- Population
Commercial hen eggs from 17 major brands, Iranian supermarkets
- Country
Iran
- Period
not stated in abstract
- Sample size
42 eggs
- Inclusion and exclusion criteria
not detailed in abstract
4. Methods and endpoints
- Exposure / intervention
Commercial hen eggs
- Comparator
FAO/WHO and Iranian maximum levels; JECFA reference values
- Endpoints
Pb, Cd concentrations; EWI, THQ, ILCR
- Statistical methods
ICP-MS; Monte Carlo simulation
5. Actual results
- Results
Mean Pb 7.16 +/- 0.248 and Cd 2.83 +/- 0.151 ug/kg whole egg, below FAO/WHO and Iranian maximum levels; estimated weekly intake 0.014 (Pb) and 0.007 (Cd) mg/week; THQ < 1; ILCR for Pb < 10^-6.
- Absolute risks
not reported
- Authors' conclusion
Lead and cadmium levels in all evaluated eggs were suitable for human consumption.
6. Strengths
- 17 brands
- Probabilistic exposure modelling
7. Weaknesses
- Small sample size
- Single country
8. Risk of bias
- Orienting tool
- none applicable
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- some concerns
- Rationale
Limited sampling.
9. Assessment of the statistical interpretation
Exposures far below reference values.
10. Relevance to the specific claim
Commercial eggs in a Middle Eastern market had Pb and Cd below limits with no estimated health risk.
11. Independent contrary findings
Pollution hotspots (A-EGG-07).
12. Transferability to Germany and Europe
Regional relevance.
13. Overall methodological judgement
Supports that routine commercial eggs are not a heavy-metal hazard.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | some concerns |
| Precision of results | moderate |
| Directness | direct |
| Reproducibility | partly replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | moderate |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
Egyptian data.
15. Linked fact checks
- Industrial (commercial, caged) egg production has turned the egg into a carrier of dioxins, PCBs, PFAS and heavy metals. – Studies contradicting or limiting the claim