Case series / case reportindependent cross-checkabstract checked I-DRY-119 standard review
Most milk-allergic children tolerate milk baked into foods
Tolerance to extensively heated milk in children with cow's milk allergy.
Overview
Nowak-Wegrzyn A et al.. J Allergy Clin Immunol 2008 · PMID 18620743 · DOI 10.1016/j.jaci.2008.05.043
75% of reactive children tolerated extensively heated milk.
Does the study support the specific claim? Partly · Methodological quality: moderate
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Test baked milk in milk-allergic children.
- How was the study done?
Food challenges.
- How many people, animals or samples were studied?
100 children.
- What was actually found?
Most tolerated baked milk.
- How large was the observed effect?
75%.
- What do the results mean in everyday life?
Heating changes some milk allergens; cheese is different.
- What are the study's limitations?
No controls.
- What does it say about Elawady's specific claim?
Narrow support for 'cooked is less allergenic'.
- Do the results apply to Germany and Europe?
Applicable.
- What can explicitly not be concluded from this study?
Cannot show that cheese is safe for allergic people.
Scientific in-depth review
1. Full reference
- Authors
- Nowak-Wegrzyn A et al.
- Journal
- J Allergy Clin Immunol
- Year
- 2008
- Identifier
- PMID 18620743 DOI 10.1016/j.jaci.2008.05.043
- Verification
- verified – PubMed efetch 2026-10-26
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
NIH grants (record).
2. Research question
Do children with milk allergy tolerate extensively heated (baked) milk?
3. Study design and population
- Study design
- Case series / case report – Prospective oral food challenge study with 3-month follow-up
- Population
Children with cow's milk allergy (mean age 7.5 y)
- Country
USA
- Period
not stated
- Sample size
100
- Inclusion and exclusion criteria
Children with milk allergy
4. Methods and endpoints
- Exposure / intervention
Extensively heated (baked) milk products
- Comparator
Unheated milk challenge
- Endpoints
Reactions; immune markers; growth; intestinal permeability
- Statistical methods
Group comparisons
5. Actual results
- Results
68 tolerated extensively heated milk only, 23 reacted to heated milk, 9 tolerated both; heated-milk-reactive children had larger skin-prick wheals and higher milk- and casein-specific IgE. 'The majority (75%) of children with milk allergy tolerate heated milk.'
- Absolute risks
not reported
- Authors' conclusion
The majority (75%) of children with milk allergy tolerate heated milk.
6. Strengths
- Oral food challenges
7. Weaknesses
- No control group
- Baked milk (e.g. in muffins) differs from cheese
- Single centre
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
Descriptive challenge study.
9. Assessment of the statistical interpretation
Proportions only.
10. Relevance to the specific claim
Partly supports the idea that thorough cooking reduces milk allergenicity, but the effect concerns heat-labile (conformational) epitopes in baked goods; casein-specific IgE predicted reaction, and cheese is casein-rich and not extensively heated.
11. Independent contrary findings
Cheese is not baked milk; casein allergy persists.
12. Transferability to Germany and Europe
Allergy practice in Europe uses milk ladders based on this principle.
13. Overall methodological judgement
Real but narrow support for 'cooked dairy is less allergenic'; does not extend to aged or processed cheese.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | some concerns |
| Precision of results | moderate |
| Directness | indirect |
| Reproducibility | replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | moderate |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
Allergenicity of specific Egyptian cheeses.