IgE Allergietest: can a DNA test help?

No, a DNA test cannot replace an IgE allergy test. IgE tests measure specific antibodies against allergens in the blood – that is the clinical gold standard. DNA tests analyze genetic variants that may be associated with a higher risk of allergies (e.g., in genes like IL4, IL13, FCER1A). However, effect sizes are small, and predictive power for individuals is low. Current guidelines and RCTs (e.g., PMID 37813841) show no benefit of nutrigenetic testing for diet or allergy diagnosis. A DNA test can only serve as supplementary information, not as a substitute for medical diagnostics. Caveat: No clinical actionability from genetic variants alone. If an allergy is suspected, an IgE test by a physician is essential.