Kiwi allergy
Kiwifruit allergy, sometimes linked to latex-fruit syndrome.
About kiwi allergy
Kiwifruit allergy is a recognised food allergy that ranges from mild mouth symptoms to serious whole-body reactions. It is IgE-mediated: the immune system produces antibodies to kiwi proteins, chiefly one called actinidin and other proteins, and eating the fruit triggers a release of histamine and other chemicals. Kiwi is part of the latex-fruit syndrome, so people allergic to natural rubber latex may cross-react with it, and some people are sensitised through birch pollen, which tends to produce milder, mouth-limited symptoms.
Symptoms usually appear quickly, within minutes to a couple of hours. In the pollen-linked pattern, reactions are often confined to an itchy, tingling mouth, lips and throat. In others, particularly younger children and those sensitised to the more stable kiwi proteins, reactions can be more marked, with hives, swelling, vomiting, wheeze and occasionally anaphylaxis. Alongside the latex link, there can be overlap with other fruits such as banana, avocado and fig, and with birch-related foods.
Diagnosis uses your history with skin-prick or specific-IgE tests, sometimes with fresh fruit or component testing to gauge the risk level. Management means avoiding kiwi where it triggers you, reading labels on fruit salads, smoothies and desserts, and being alert to the latex connection. If your allergy team judges you at risk of a severe reaction, they may prescribe an adrenaline auto-injector. A serious reaction with breathing difficulty or collapse is a medical emergency: call 999.
Common triggers
- Kiwi 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.