How to Explain Food Allergies When Traveling Abroad
Managing a food allergy at home is largely a solved problem: you know the brands, you know which restaurants take it seriously, and you can ask a question in your own language and understand the answer. Abroad, all of that disappears at once. You are reading a label you cannot parse, asking through a translation app, and relying on a server who may be working from a completely different idea of what "allergy" means.
The gap is rarely bad faith. The information you need — what is in the sauce, what the oil fried before — is simply not what most kitchens are set up to give. Nothing below replaces the plan you have worked out with your own doctor or allergy specialist; it is about making that plan survive contact with a language you do not speak.
Why "no nuts" often isn't enough
Naming an allergen sounds like the complete message. It usually is not, for four reasons.
Categories don't translate cleanly. In many languages the everyday word for "nut" excludes peanuts, which are legumes, so a kitchen told "no nuts" may still reach for peanut oil. The reverse happens too: a request framed around peanuts leaves cashews and almonds untouched. Name specific foods, not categories.
Cooking oil is invisible. Frying oil rarely appears on a menu or a label, yet it is often peanut, sesame or a blend, and one fryer may serve the whole kitchen.
Cross-contamination is a separate question. A dish can be made without your allergen and still be plated with the same tongs, cut on the same board, or finished from a shared pot. "Does this contain X" and "could this have touched X" are different questions, and only the second one covers a severe allergy.
Sauces hide everything. Almost every cuisine has a base condiment that turns up in dishes you would never suspect. That is where most surprise reactions come from.
The hidden ingredients that catch people out
| Allergen | Where it hides |
|---|---|
| Fish | Fish sauce across Southeast Asia, Japanese dashi stock, Worcestershire sauce, Caesar dressing, some pizza toppings and stews |
| Shellfish | Oyster sauce in Chinese and Cantonese cooking, Thai and Malay shrimp pastes, prawn crackers, seafood-based stocks and broths |
| Gluten | Soy sauce (most types contain wheat), tempura and other batters, beer, thickened sauces and gravies, some processed meats |
| Peanut | Frying and finishing oils, satay and other peanut sauces, Vietnamese dipping sauces and garnishes, ground peanut in baked goods and desserts |
| Tree nuts | Marzipan and nougat in European pastry, pesto, ground nuts used to thicken curries and Middle Eastern sauces |
| Dairy | Ghee and cream in South Asian curries, butter finishing on grilled meats and vegetables, baked goods, whey in processed snacks |
| Egg | Mayonnaise and aioli, fresh and instant noodles, pasta, glazes brushed onto bread and pastry, foams and some cocktails |
| Sesame | Tahini in Middle Eastern dips and sauces, Korean side dishes and dressings, seeds baked into or sprinkled onto bread |
| Soy | Marinades, stocks, vegetarian meat substitutes, many sauces used as a background seasoning rather than a listed ingredient |
The pattern is consistent: the risk is concentrated in the parts of a dish that never get named. If you only interrogate the headline ingredient, you have checked the safest part of the plate.
Write it down before you go
The single most effective thing you can do is carry an allergy card written in the local language. Spoken translation gets garbled; a card can be handed straight to the kitchen, and it is the same message every time.
A card that works includes, in the local language:
- The specific foods you react to, named individually rather than as a category
- A clear statement that this is a severe allergy and not a preference or a diet
- A request that the food not be cooked in the same oil, or with the same utensils and surfaces
- A short line explaining what happens if you eat it, including the need for a hospital
Keep it in three places: printed on paper, saved as a photo in your phone's gallery, and set as a lock-screen image or offline note. The screenshot matters more than people expect — translation apps, cloud notes and mobile data all fail in basements, on islands and in rural areas, and a card that needs a network connection is not a card. Carry a written note of your emergency medication and your doctor's contact details too, in case someone else has to read it for you.
Have a native speaker check the wording if you can. Machine translation of "allergy" is usually accurate; machine translation of "cross-contamination" often is not, and "cooked in a separate pan with clean utensils" survives translation far better than the technical term.
Phrases that actually work
| What to say | Why it works |
|---|---|
| "If I eat this, I will get very sick and go to hospital." | In many places "allergy" is heard as a strong dislike. Describing the consequence converts it into something the kitchen treats as serious. |
| "What is in this?" | An open question. Asking "does this have fish in it?" invites a yes/no answer given from memory, and the answer is often optimistic. |
| "Can you show me the package?" | Puts the actual ingredient list in front of you instead of relying on recall or on someone else's translation. |
| "Which oil do you fry in?" | Oil is the most common hidden source and almost never comes up unless you raise it directly. |
| "Please cook it in a clean pan." | Concrete and physical. Kitchen staff can act on it, where an abstract request about contamination may not land. |
| "I cannot eat it even a small amount." | Counters the widespread assumption that a little is fine, which is the single most common misunderstanding. |
| "Is there fish sauce, oyster sauce or stock in it?" | Naming the specific hidden carriers of your allergen is more productive than naming the allergen alone. |
Ask before you order rather than after the food arrives. Once a dish is cooked, the social pressure runs toward reassurance, and you are far more likely to get a confident answer that has not been checked.
Where allergy awareness is high — and where it isn't
Regulation varies widely, and it helps to know what to expect rather than assume the standard you are used to.
Across Western and Northern Europe, food law requires a defined list of fourteen allergens to be declared on packaged food and disclosed for food sold loose, including in restaurants. Staff are generally trained to answer, and asking is routine. Similar frameworks exist in North America and Australasia, though the allergen lists differ.
In much of East Asia, labeling systems for packaged food exist and are used, but the practical barrier is language rather than regulation — the information is printed and you cannot read it. Restaurant staff may be less accustomed to the question, particularly at small specialist shops.
At street stalls and family kitchens anywhere in the world, and across much of South and Southeast Asia, there is often no labeling framework covering prepared food at all. Ingredients change with what the market had that morning, sauces are made in-house from recipes nobody wrote down, and the cook may genuinely not be able to answer. That is not a warning about any country; it is how informal food economies work, and it applies equally to a market stall in Europe. Where the system cannot answer for you, the judgment is yours — which usually means choosing simple dishes with visible ingredients over complex ones with sauces.
Reading ingredient lists and menus you can't read
The two hardest moments are the same problem in different packaging: a menu in an unfamiliar script, and the back of a snack packet in a convenience store. Both contain the answer; both are locked behind a writing system. Photographing the text and reading it back in your own language is the fastest way through, and for packaged food it often beats asking, because the label is a regulated statement while a spoken answer is a recollection. Treat it as a first filter, not a guarantee: it tells you what is declared, and you still ask about oil and shared equipment.
FAQ
Can I bring an epinephrine auto-injector on a plane? Airlines generally allow prescribed injectors in carry-on baggage, and keeping them in the cabin rather than checked luggage is standard advice. Carry them in labeled packaging with the prescription or a doctor's letter, and check your airline's and destination's rules in advance, since some countries restrict specific medications. Your prescribing doctor is the right person to confirm what you should travel with.
The restaurant said the dish was safe and I reacted anyway. What now? Treat it as a medical situation first and follow the emergency plan you agreed with your doctor, seeking care rather than waiting to see how it develops. Afterward, find out what the dish actually contained if you can — the answer is usually a stock, a sauce or a shared fryer, and knowing which tells you what to ask about for the rest of the trip. Save the local emergency number and the nearest hospital in your phone before you need them.
Does a vegetarian or vegan label mean it's free of dairy and egg? Vegan labeling excludes dairy and egg as ingredients, but it is a claim about the recipe, not the kitchen, so shared equipment is still possible. Vegetarian labeling excludes neither, and in several cuisines a dish marked vegetarian is routinely finished with butter, ghee, cream or egg. Dietary labels and allergen safety are different systems, and only one of them was designed with your health in mind.