Buckwheat allergy
Buckwheat allergy, more common in some regions.
About buckwheat allergy
Despite its name, buckwheat is not a type of wheat and contains no gluten; it is a seed used in foods such as pancakes, noodles (including Japanese soba), some gluten-free products and porridge. Buckwheat allergy is an IgE-mediated allergy that is relatively uncommon in the UK but is a more significant cause of food allergy in parts of Asia, where it is eaten more often. It can affect both children and adults.
Buckwheat is known as an allergen that can cause strong reactions in sensitised people. Symptoms usually begin within minutes to two hours of eating and may include an itchy mouth, hives, swelling, stomach upset, wheezing and, in some cases, anaphylaxis. Because buckwheat flour can be inhaled during cooking or baking, some people may also react to airborne flour. It is not closely related to cereal grains, so a buckwheat allergy does not by itself mean a person is allergic to wheat or other grains.
Diagnosis is made by an allergy specialist using skin-prick or specific-IgE blood tests alongside the history, sometimes with a supervised food challenge. Management is based on avoiding buckwheat and reading labels carefully, as it can appear in gluten-free foods, health products, noodles and some pillows and cushions filled with buckwheat husks. People at risk of severe reactions may be prescribed an adrenaline auto-injector. Treat any severe reaction with breathing difficulty or collapse as an emergency and call 999.
Common triggers
- Buckwheat and products containing it
Symptoms
- Itching or tingling in the mouth
- Hives, itching or eczema
- Swelling of the lips, face, tongue or throat
- Stomach cramps, nausea, vomiting or diarrhoea
- Wheezing or trouble breathing
- In severe cases, anaphylaxis
Avoidance & management
- Read ingredient labels every time
- Ask about ingredients and cross-contamination when eating out
- Keep the food out of shared cooking areas
- Carry prescribed antihistamines or an adrenaline auto-injector
- Seek emergency help for any severe reaction
Sources & references
Allergy safety: what everyone should know
Mild-to-moderate reaction signs
- Itching, hives or a raised rash
- Swelling of lips, face or eyes
- Tingling mouth, sneezing, runny nose
- Stomach pain, nausea or vomiting
Anaphylaxis — call 999 (UK) or 112 (EU) immediately
- Difficult or noisy breathing, wheeze, persistent cough
- Swelling of the tongue or tightness in the throat
- Dizziness, collapse, pale and floppy (young children)
- Use an adrenaline auto-injector (e.g. EpiPen) at once if prescribed, then call an ambulance even if symptoms improve
Allergy or intolerance? A true allergy involves the immune system and can escalate quickly; an intolerance (e.g. lactose intolerance) is unpleasant but not life-threatening. The symptoms overlap, so self-diagnosis is unreliable.
Getting tested: home-testing kits based on IgG are not diagnostically valid. If you suspect an allergy, ask a GP for referral to an allergy clinic for skin-prick or specific-IgE testing and a supervised food challenge where appropriate.