Measurement / residue studycited by the Tayebat archiveabstract only checked★ key study A-CHK-09 in-depth review
Carcinogen PhIP in grilled chicken
High concentrations of the carcinogen 2-amino-1-methyl-6-phenylimidazo- [4,5-b]pyridine (PhIP) occur in chicken but are dependent on the cooking method.
Overview
Sinha R et al.. Cancer Res 1995 · PMID 7553619
Well-done grilled or fried chicken breast had high PhIP levels; stewed chicken had none.
Does the study support the specific claim? Yes · Methodological quality: moderate
Plain-language summary
Study explained simply
- What did the researchers want to find out?
What are HAA levels in chicken by cooking method?
- How was the study done?
Laboratory measurement of HAAs in chicken cooked by different methods and doneness
- How many people, animals or samples were studied?
Not stated in abstract; Chicken breasts and whole chickens
- What was actually found?
PhIP 12-480 ng/g in pan-fried, oven-broiled and grilled breasts; not in roasted or stewed whole chicken; increased with time, temperature and browning; IQ and MeIQ not detected.
- How large was the observed effect?
Descriptive
- What do the results mean in everyday life?
Gentler cooking avoids these compounds.
- What are the study's limitations?
1995 data; No health outcome
- What does it say about Elawady's specific claim?
Supports formation; not specific to chicken.
- Do the results apply to Germany and Europe?
High.
- What can explicitly not be concluded from this study?
Cannot quantify cancer risk.
Scientific in-depth review
1. Full reference
- Authors
- Sinha R, Rothman N, Brown ED, Salmon CP, Knize MG, Swanson CA, Rossi SC, Mark SD, Levander OA, Felton JS
- Journal
- Cancer Res
- Year
- 1995
- Identifier
- PMID 7553619
- Verification
- verified – PubMed E-utilities efetch, 2026-10-25
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
No COI statement in record; NCI
2. Research question
What are HAA levels in chicken by cooking method?
3. Study design and population
- Study design
- Measurement / residue study – Laboratory measurement of HAAs in chicken cooked by different methods and doneness
- Population
Chicken breasts and whole chickens
- Country
USA
- Period
Published 1995
- Sample size
Not stated in abstract
- Inclusion and exclusion criteria
Standardised cooking
4. Methods and endpoints
- Exposure / intervention
Pan-frying, broiling, grilling, roasting, stewing; doneness
- Comparator
Methods
- Endpoints
PhIP, MeIQx, DiMeIQx, IQ, MeIQ (ng/g)
- Statistical methods
Descriptive
5. Actual results
- Results
PhIP 12-480 ng/g in pan-fried, oven-broiled and grilled breasts; not in roasted or stewed whole chicken; increased with time, temperature and browning; IQ and MeIQ not detected.
- Absolute risks
not applicable
- Authors' conclusion
Certain methods produce PhIP at higher levels in chicken than reported for red meat.
6. Strengths
- Controlled cooking
7. Weaknesses
- 1995 data
- No health outcome
8. Risk of bias
- Orienting tool
- none applicable
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- low
- Rationale
Laboratory study.
9. Assessment of the statistical interpretation
Not applicable.
10. Relevance to the specific claim
11. Independent contrary findings
I-CHK-06 (IARC: insufficient data on cooking).
12. Transferability to Germany and Europe
High.
13. Overall methodological judgement
Accurately cited.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | low |
| Precision of results | moderate |
| Directness | indirect |
| Reproducibility | replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | high |
| Adequacy of the interpretation (by the archive) | correctly reported |
14. Open questions
Health impact.
15. Linked fact checks
- Grilling or pan-frying chicken breast forms potent carcinogens (PhIP up to 480 ng/g). – Studies supporting the claim
Use by the Tayebat archive
Note: according to the archive, the studies were compiled by the archive operators. Whether Dr. Elawady himself cited this study is not established.
- What the archive says about the study
Pan-fried, broiled or grilled chicken breasts contained PhIP at 12-480 ng/g; boiled/stewed chicken contained none.
- A. What was actually studied?
HCAs in cooked chicken.
- B. What did the authors find?
As quoted.
- C. What conclusions do the authors themselves draw?
Cooking method matters.
- D. What does the archive derive from it?
Used to argue chicken forms carcinogens.
- E. Is this derivation scientifically justified?
Correct regarding formation; applies to all meats cooked at high heat.
- Adequacy of the interpretation (by the archive)
- correctly reported