🟡Mustard allergy
Mustard allergy is less widely known than peanut or milk allergy, but it can cause severe reactions, and mustard is one of the 14 major allergens in the EU and UK. It is managed by avoiding mustard in all its forms and being ready to treat a reaction.
🔬What it means
In a mustard allergy the immune system mistakes proteins from mustard seeds and plants for a threat and releases chemicals such as histamine. Even a small amount can trigger a reaction in some people.
Mustard allergy is reported more often in some European countries, such as France, where mustard is widely used. In the EU and UK mustard must be highlighted in the ingredients, but in the US it is not one of the major allergens on labels, so it may appear only as “spices” or “flavourings”.
✅What you can eat
- 🥩Naturally mustard-free foods: plain meat, fish, eggs, dairy, grains, fruit and vegetables cooked without seasoning mixes.
- 🧂Simple seasoning you control: salt, pepper, herbs and single spices, checked one by one.
- 🥗Dressings and sauces made at home without mustard — shop-bought ones often contain it.
🚫What to avoid
- 🟡Mustard in any form: prepared mustard (Dijon, wholegrain, English, American), mustard seeds, mustard powder and flour.
- 🥬Mustard plants: mustard leaves (greens), mustard cress and sprouts, mustard oil.
- 🥗Sauces and dressings: vinaigrettes, mayonnaise, remoulade, honey mustard, some barbecue sauces and marinades.
- 🍛Spice mixes and Indian dishes: curry powders, many curries, dals and pickles where mustard seeds are fried at the start, dishes cooked in mustard oil.
- 🌭Meat products and pickles: sausages, hot dogs, salami, cured meats, piccalilli, pickled vegetables, chutneys.
- 🏷️Labels and restaurants: “May contain mustard” means there is a risk of traces — most allergists advise avoiding these products. Tell the staff every time.
⚠️What happens during a reaction
Symptoms usually start within minutes to two hours: itchy mouth, hives, redness, swelling of the lips or face, stomach pain, vomiting, sneezing or a runny nose.
A severe reaction — anaphylaxis — affects breathing or circulation: swelling of the tongue or throat, hoarse voice, wheezing, difficulty breathing, feeling faint, pale or floppy skin, collapse. It can develop fast and is life-threatening.
A mild reaction last time does not mean the next one will be mild. People with asthma are at higher risk of a severe reaction.
🚑When to get help urgently
If there are any signs of anaphylaxis, use an adrenaline auto-injector if you have one and call emergency services immediately, even if symptoms improve. Lie down with legs raised (or sit up if it is hard to breathe) and do not stand up or walk suddenly. After any reaction, see a doctor about an allergy plan.
📱How Me Nutrition helps
Every dish in the app and on this site shows the major allergens of a typical recipe, including mustard, and which ingredient contains it. Recipes differ and traces are not covered, so always check with whoever cooked the dish.
Dishes that contain it: 23
Sources
Written from the sources below; not reviewed by a doctor. Not medical advice. How we count →