Foods containing fish: the complete list, and where it hides

Worcestershire sauce, Caesar dressing, kimchi and half the curry pastes on the shelf. The fish nobody mentions is the problem.

October 9, 2026

Fish allergy is one of the fourteen allergens European law requires on a label, and it is one of the few that usually arrives in adulthood and stays for life.

The obvious sources are easy to avoid. People get caught out by fish in things that are not sold as fish: the sauce, the dressing, the stock cube, the thing that tastes savoury for reasons nobody mentions.

Below is every ingredient our database grades as containing fish, and where it hides.

Fish allergy and shellfish allergy

People often mix up fish allergy and shellfish allergy, and they are separate. Fish allergy is a reaction to a protein called parvalbumin, found in finned fish. Shellfish allergy is a reaction to tropomyosin, found in crustaceans and molluscs. The proteins are unrelated, so being allergic to one says nothing about the other, and plenty of people react to prawns and eat salmon happily.

Parvalbumin is heat-stable.¹ Cooking does not destroy it, and steam carrying it from a pan is enough to cause a reaction in some people. This is why fish allergy is one of the few where the kitchen itself can be the problem.

The foods most people know about

These are the fish themselves, and the everyday foods that carry fish without saying so on the front of the pack.

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The complete list

This is every ingredient our database grades as containing fish, and each one links to its own page.

Food	Notes
Salmon	Salmon is a popular fatty fish. A pink-fleshed fish rich in omega-3 fatty acids.
Tuna	Low FODMAP protein. Canned/fresh tuna can cause scombroid (histamine) if mishandled; also a good omega‑3 source.
Caesar dressing	Classic Caesar uses anchovy, egg yolk, Parmesan and garlic (fructans) → not vegan/vegetarian and often high FODMAP. Fish, egg & milk are major allergens.
Flounder	Lean white fish; FODMAP-free. Ensure very fresh to avoid histamine build-up. Excluded on 6-FED (fish/shellfish).
Worcestershire sauce	Low-FODMAP in small serves but can contain barley malt vinegar (gluten) and anchovies; choose GF-labelled versions.
Whitefish	Generic white fish (cod, haddock, etc.) are FODMAP-free proteins; fresher fish means lower histamine.
Pollock	Lean white fish; FODMAP-free. As with other fish, histamine rises with poor storage—eat fresh.
Bass	White fish (like bass) is FODMAP-free and protein-rich. Ensure freshness to minimise histamine formation.
Mackerel	Oily fish rich in omega-3; FODMAP-free. Ensure freshness to avoid histamine issues.
Tilapia	Lean white fish; low FODMAP.
Kimchi	Fermented cabbage with garlic/chili; high in biogenic amines (histamine/tyramine). GF unless wheat flour added.
Trout	Fish is FODMAP‑free; ensure freshness to reduce histamine risk.
Sole	Default mapping by category; specific lab data limited—use conservative portions.
Fish sauce	Fermented condiment; carbohydrate content is low but biogenic amines (histamine/tyramine) can be high. Check brand for added sugar/gluten.
Haddock	Fish is FODMAP-free; oily species provide omega-3s; ensure freshness to avoid histamine issues.
Snapper	Lean white fish; naturally low-FODMAP. Histamine issues arise mainly if mishandled (scombroid).
Catfish	Plain fish is FODMAP‑free; general histamine cautions apply as with other fish.
Halibut	Fish is FODMAP-free; oily species provide omega-3s; ensure freshness to avoid histamine issues.
Sardines	Sardines are small oily fish. A nutritious fish often canned in oil or sauce.
Mahi-mahi	Lean fish; FODMAP‑free.
Anchovy	Plain fish is FODMAP‑free; anchovies are often fermented/salted and can be high in histamine/tyramine—avoid if histamine‑intolerant or on MAOIs.
Bream	Bream is a freshwater or sea fish. A mild white fish popular in Mediterranean cuisine.
Herring	Fish is FODMAP-free; oily species provide omega-3s; ensure freshness to avoid histamine issues.
Grouper	Fish is FODMAP-free; oily species provide omega-3s; ensure freshness to avoid histamine issues.
Yellowtail	Fish = FODMAP-free protein; ensure freshness to reduce histamine risk.
Pike	Lean freshwater fish; FODMAP-free. Keep very fresh to avoid histamine build-up.
Carp	Plain fish is FODMAP‑free; as with all fish, histamine issues relate to improper storage.
Bonito	As fish/bonito flakes: FODMAP‑free but very high in natural glutamate (umami) and biogenic amines; watch histamine intolerance.
Perch	Lean white fish; no carbs (FODMAP-free). Freshly cooked is low histamine; avoid if not very fresh.
Rockfish	Lean white fish; low-FODMAP. Histamine issues mainly if not kept cold (scombroid risk applies broadly).
Anchovy paste	Concentrated anchovy with salt/oil; same histamine/tyramine caveats; check labels for added garlic.
Hake	Fish is FODMAP-free; oily species provide omega-3s; ensure freshness to avoid histamine issues.
Shark	Lean fish (FODMAP-free). Note: large predatory fish like shark tend to be high in mercury—avoid in pregnancy and limit generally.
Eel	Seafood is naturally FODMAP‑free; freshness/handling important for histamine‑sensitive folks.
Sablefish	Also called black cod. Fatty fish rich in omega-3s; FODMAP-free. As with all fish, histamine forms if not kept cold.
Sturgeon	Plain fish is FODMAP-free; ensure freshness to avoid histamine issues.
Tobiko	Flying fish roe; very low carbs; may contain colorants/preservatives; some histamine risk as with other seafoods.
Barracuda	Fish is FODMAP-free. As with all fish, improper storage can lead to histamine (scombroid) poisoning—buy fresh and refrigerate promptly.
Turbot	Fish are FODMAP-free protein. Histamine can form if not kept cold; choose very fresh fish.
Pompano	Rich, delicate fish; FODMAP-free. Handle and cook fresh to minimize histamine.
Tilefish	Low FODMAP, but avoid for pregnancy/children due to high mercury classification.
Wahoo	Lean white fish; FODMAP-free protein. Freshness matters to minimize histamine.

Where fish hides

Worcestershire sauce contains anchovies. So does traditional Caesar dressing, and most Caesar salads in restaurants.

Fish sauce is the backbone of a great deal of South East Asian cooking, and it does not always announce itself on a menu. Kimchi frequently contains it. So do many curry pastes, Thai ones especially.

Stock cubes, bouillon and gravy granules sometimes contain fish extract. Tapenade and some olive spreads contain anchovy.

Omega-3 supplements are usually fish oil. Vitamin D supplements sometimes are.

Some wines and beers are fined with isinglass, made from fish swim bladders, though the amount reaching the glass is generally considered too small to react to. Some imitation crab contains real fish, because surimi is made from white fish.

Cross-contact worth knowing

A shared fryer is the classic problem. Chips cooked in oil that has fried battered fish carry enough protein to cause a reaction, and this is one of the most common causes of a reaction in a restaurant that thought it was being careful.

Fishmonger counters and shared grills carry the same risk. Ask whether something was cooked on a surface used for fish, as well as what is in the dish.

Living with it

Fish allergy is usually lifelong. Children often outgrow milk and egg allergy; fish allergy tends to stay. It is also one of the more common causes of anaphylaxis in adults, so if you have been diagnosed, carry your adrenaline auto-injector every time.

Being allergic to one fish does not mean being allergic to all of them, though many people are, and testing individual species with an allergist is worth doing before you avoid the whole category.

Journal your day in 30 seconds, find your triggers.

Check any food in seconds

The fish checker grades any food in our database, and every food on this page links to its own page.

Where Triggerbites fits in

Triggerbites checks products against all fourteen EU allergens, fish among them. Scan a barcode, say a brand name or photograph the ingredients label, and the app shows you what the product declares.

For a diagnosed fish allergy that is a shopping aid, and no label tool sees cross-contact. For the reactions that keep happening when you did everything right, you need a record of what you ate and where. You journal your day in plain words or by voice, in about 30 seconds: "porridge and a coffee at home, a burger and chips at the pub for lunch, a Caesar salad for dinner, itchy mouth and hives after lunch." Over a few weeks that record is what finds the shared fryer, and you can export it as a PDF for your allergist.

Log your day in 30 seconds

Text, voice or photo. Log as you go, or recap it all in the evening.

Your food, broken down

Meals become ingredients and sensitivity profiles: histamine, salicylates, FODMAPs, allergens, and even the additives on packaged food.

Everything in the same journal

Symptoms, supplements, sleep, stress, exercise and mood, beside what you ate.

See what repeats over time

Patterns between what you eat and how you feel, including delayed reactions that show up days later.

Common questions

Is fish allergy the same as shellfish allergy?

No. Fish allergy is a reaction to parvalbumin in finned fish. Shellfish allergy is a reaction to tropomyosin in crustaceans and molluscs. The proteins are unrelated, so plenty of people react to prawns and eat salmon happily.

Where does fish hide in everyday food?

Worcestershire sauce and traditional Caesar dressing both contain anchovies. Fish sauce appears in kimchi and many curry pastes. Stock cubes and gravy granules sometimes contain fish extract, and omega-3 supplements are usually fish oil.

Does cooking destroy the fish allergen?

No. Parvalbumin is heat-stable, so cooking does not remove it. Steam carrying it from a pan is enough to cause a reaction in some people, which makes fish one of the few allergies where the kitchen itself is a risk.

Can I eat chips cooked in a shared fryer?

Not safely. Oil that has fried battered fish carries enough protein to cause a reaction, and a shared fryer is one of the most common causes of a reaction in a restaurant that thought it was being careful.

Do children outgrow fish allergy?

Usually not. Unlike milk and egg allergy, fish allergy tends to arrive later and stay for life. It is also one of the more common causes of anaphylaxis in adults, so carrying an adrenaline auto-injector matters.

Am I allergic to all fish if I react to one?

Not necessarily, though many people are. Testing individual species with an allergist is worth doing before you avoid the whole category, because the protein varies between species.

Live, love, log. 🧡

References

1
Ruethers T, et al. "Seafood allergy: a comprehensive review of fish and shellfish allergens" Molecular Immunology, 2018PubMed