Guideline / position statementindependent cross-checkabstract only checked I-MEAT-05 standard review
A controversial panel: no strong reason to change meat intake
Unprocessed Red Meat and Processed Meat Consumption: Dietary Guideline Recommendations From the Nutritional Recommendations (NutriRECS) Consortium.
Overview
Johnston BC et al.. Ann Intern Med 2019 · PMID 31569235 · DOI 10.7326/M19-1621
Weak recommendation to continue current intake.
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?
Meat recommendations.
- How was the study done?
Guideline panel.
- How many people, animals or samples were studied?
Adults.
- What was actually found?
Continue current intake (weak).
- How large was the observed effect?
n/a
- What do the results mean in everyday life?
Evidence for harm at usual intakes is uncertain.
- What are the study's limitations?
Controversial.
- What does it say about Elawady's specific claim?
Limits certainty of benefits.
- Do the results apply to Germany and Europe?
Moderate.
- What can explicitly not be concluded from this study?
That processed meat is harmless.
Scientific in-depth review
1. Full reference
- Authors
- Johnston BC et al.
- Journal
- Ann Intern Med
- Year
- 2019
- Identifier
- PMID 31569235 DOI 10.7326/M19-1621
- Verification
- verified – PubMed efetch 2026-10-25
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
Grants listed in PubMed: NIEHS NIH HHS
2. Research question
Should adults reduce unprocessed red and processed meat?
3. Study design and population
- Study design
- Guideline / position statement – Guideline recommendations based on 5 systematic reviews, GRADE (NutriRECS).
- Population
Adults
- Country
International panel (7 countries)
- Period
2019
- Sample size
5 systematic reviews
- Inclusion and exclusion criteria
n/a
4. Methods and endpoints
- Exposure / intervention
Red and processed meat
- Comparator
n/a
- Endpoints
Health outcomes; values and preferences.
- Statistical methods
GRADE.
5. Actual results
- Results
Panel suggests adults continue current unprocessed red meat consumption (weak recommendation, low certainty) and current processed meat consumption (weak recommendation, low certainty).
- Absolute risks
not applicable
- Authors' conclusion
Weak recommendations to continue current intake.
6. Strengths
- Explicit GRADE; values and preferences
7. Weaknesses
- Controversial; contradicts most guideline bodies
- Article corrected
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
Guideline framing debated.
9. Assessment of the statistical interpretation
n/a
10. Relevance to the specific claim
Limits C-MEAT-01.
11. Independent contrary findings
12. Transferability to Germany and Europe
Moderate.
13. Overall methodological judgement
Minority guideline position.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | some concerns |
| Precision of results | not applicable |
| Directness | direct |
| Reproducibility | not replicated |
| Consistency with the overall evidence | inconsistent |
| Regional transferability | moderate |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
n/a
15. Linked fact checks
- Red meat should be limited: beef/buffalo at most once a week and lamb twice a week (protein not every day). – Studies contradicting or limiting the claim