Overview
About Eel
Eel is a fatty, gelatinous fish that carries moderate histamine and moderate tyramine, which puts it on the caution list for histamine intolerance and for anyone on a MAOI tyramine-restricted diet.
But for most people the trigger is not the fish at all: unagi and kabayaki are glazed in a soy-and-mirin sauce, and standard soy sauce is a wheat food, a soy food, and a fermented one carrying its own histamine and tyramine load. The eel grades clean on gluten. The dish as served almost never does.
Sensitivities
How Eel scores
Watch for
What trips people up
- Unagi sauce is brewed soy sauce plus mirin and sugar. Unless it is a tamari version, that is wheat, and it stacks fermentation-derived histamine and tyramine on top of the fish
- Moderate tyramine, so eel appears on tyramine-restriction lists given with MAOI antidepressants. Smoked and jellied eel, both traditional preparations, sit higher again
- Escolar is not eel. It gets muddled with eel and butterfish on menus and in sushi cases, and its wax esters cause an oily, orange, urgent diarrhoea (keriorrhoea) that has nothing to do with any eel trigger
- Eel is never served raw. Fresh eel blood contains a heat-sensitive toxin, which is why every traditional preparation grills, steams or smokes it first
Diet fit
Where it fits
Swap ideas
More alternatives
FAQ
Common questions about Eel
Does unagi contain gluten?
The eel does not, but the sauce almost always does. Unagi and kabayaki glaze is built on brewed soy sauce, which in its standard form is fermented from wheat as well as soybeans. Unless the restaurant confirms a tamari or gluten-free soy base, treat glazed eel as a wheat-containing dish.
Is eel high in histamine?
Fresh eel is moderate, not high. What raises it is the way eel is usually sold: smoked, jellied or pre-glazed and held, all of which give bacteria time to convert histidine into histamine. Freshly grilled eel is the lowest-histamine version, and the sauce is often the bigger contributor anyway.
Is escolar the same as eel?
No. Escolar is a snake mackerel, sold under names like white tuna, butterfish and occasionally confused with eel at sushi counters. It is not a trigger in the histamine or salicylate sense: its problem is indigestible wax esters that pass straight through and cause oily orange stools within hours. If that is what happened, the culprit was escolar, not eel.
Why is eel never eaten raw?
Eel blood contains an ichthyotoxin that irritates mucous membranes and is destroyed by heat. Every traditional eel preparation, from Japanese unagi to Dutch smoked paling to London jellied eels, cooks the fish, which is why you will not find eel sashimi.
References
Read the background
Ratings reflect the Triggerbites ingredient database and may vary with portion size and preparation.