Peach allergy
Peach allergy, common in pollen-food syndrome.
About peach allergy
Peach is a stone fruit and a very common trigger of fruit allergy. It causes two different patterns. In northern Europe, including the UK, many reactions are a milder pollen-food syndrome linked to birch pollen, where a birch-like protein in the fruit produces mouth symptoms. In Mediterranean regions, a more stable protein called a lipid transfer protein, concentrated in the peach skin, causes stronger, sometimes whole-body reactions. Both are IgE-mediated, with the immune system making antibodies that release histamine when the fruit is eaten.
Symptoms usually start quickly, within minutes to a couple of hours. The birch-linked form typically causes an itchy, tingling mouth, lips and throat, often worse with raw fruit and improved by peeling or cooking. The lipid-transfer-protein form can cause hives, swelling, vomiting, wheeze and, occasionally, anaphylaxis, and may be triggered by even peeled fruit. The peel tends to hold more allergen than the flesh. There is recognised overlap with other stone fruits such as cherry, plum, apricot and nectarine, and, in the lipid-transfer-protein pattern, with apple and nuts.
Diagnosis uses your history with skin-prick or specific-IgE testing, and component testing can help tell the milder pattern from the higher-risk one. Management means avoiding peach where it triggers you, considering peeling or cooking for pollen-linked cases, and reading labels on juices, jams and desserts. If your allergy team judges you at risk of a severe reaction, an adrenaline auto-injector may be prescribed, and any serious reaction is a medical emergency: call 999.
Common triggers
- Peach 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.