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Unproven techniques in allergy diagnosis
1University of Zürich, Zürich, Switzerland. wuethric@derm.unizh.ch
Summary
Unproven allergy tests lack scientific validity and do not correlate with clinical allergy evidence. Standardized testing, like the double-blind placebo-controlled food challenge (DBPCFC), remains the gold standard for accurate food hypersensitivity diagnosis.
Area of Science:
- Immunology
- Allergy Diagnostics
- Clinical Medicine
Background:
- Mainstream allergy diagnosis relies on validated methods.
- Several unproven tests exist, lacking scientific rationale.
Purpose of the Study:
- Evaluate the scientific basis of unproven allergy diagnostic methods.
- Compare unproven tests with established diagnostic standards.
Main Methods:
- Review of scientific literature on unproven allergy tests.
- Comparison of test results with clinical evidence and double-blind placebo-controlled food challenges (DBPCFC).
Main Results:
- Unproven tests show no reproducible results or clinical correlation.
- Food-specific IgG and IgG4 levels reflect dietary intake, not allergy.
- Simultaneous IgE and IgG testing for multiple foods is uneconomical and diagnostically useless.
Conclusions:
- Unproven allergy testing methods are not recommended.
- DBPCFC is the reference standard for food hypersensitivity.
- New tests require validation against DBPCFC.