Wheat Allergy
Also known as: Wheat protein allergy
Wheat allergy is an immune reaction to proteins in wheat — distinct from coeliac disease (an autoimmune condition) and non-coeliac gluten sensitivity. It can cause immediate IgE-mediated reactions or delayed symptoms.
Category
Food Allergies
Severity
Moderate to SeverePrevalence
About 0.4–1% of children; less common in adults.
Symptoms
Airways & Breathing
- Rhinitis
- Asthma
- Exercise-induced anaphylaxis (wheat-dependent, WDEIA)
Skin
- Hives
- Eczema
- Contact dermatitis (bakers' asthma)
Digestive
- Nausea
- Vomiting
- Diarrhoea
Systemic / Other
- Anaphylaxis
- Wheat-dependent exercise-induced anaphylaxis (WDEIA)
How It's Diagnosed
- Skin prick test and specific IgE to wheat
- Component testing: omega-5-gliadin (Tri a 19) for WDEIA
- Exclusion diet and oral food challenge
- Distinguish from coeliac (tissue transglutaminase IgA) and gluten sensitivity
Avoidance Strategies
- Avoid wheat flour, bread, pasta, couscous, semolina, bulgur, spelt, kamut, and durum
- Safe grains include rice, corn/maize, oats (if uncontaminated), quinoa, millet, sorghum
- Wheat starch may be tolerated — depends on the individual; test under supervision
- Beer, soy sauce (traditional), and many processed foods contain wheat
Cross-Reactivity
- Other grasses: rye, barley contain similar glutens but wheat allergy is not always cross-reactive
- Grass pollen: pollen-food allergy syndrome may cause oral symptoms with wheat
Wheat allergy vs coeliac disease vs gluten sensitivity
| Feature | Wheat Allergy | Coeliac Disease | Non-coeliac Gluten Sensitivity |
|---|---|---|---|
| Mechanism | IgE or non-IgE immune | Autoimmune (T-cell) | Unknown |
| Triggers | Wheat proteins | Gluten (wheat, rye, barley) | Gluten |
| Onset | Minutes to hours | Days to weeks | Hours to days |
| Test | Skin prick / IgE | tTG-IgA / biopsy | Exclusion diagnosis |
| Outgrow? | Often in children | No | No |
WDEIA — wheat-dependent exercise-induced anaphylaxis
Some individuals develop anaphylaxis only when they eat wheat AND exercise within a few hours. Either alone is tolerated. The trigger is the combination. The key allergen is omega-5-gliadin (Tri a 19).
Management involves avoiding wheat before exercise and carrying an adrenaline auto-injector during physical activity.
Related Allergens
Medical disclaimer
This page is for educational purposes only. Allergy diagnosis and management must be carried out by a qualified allergist. Do not attempt to test yourself with suspected allergens. Always carry prescribed emergency medications and follow your written action plan.
Reviewed 2026-06-01 · Looms Medical Team