Every food below falls into one of three buckets: leave it out, treat it carefully, or eat it freely. Search for a specific food, or filter to just one tier when you are planning a shop.
New to this? Read the histamine guide first — it covers how histamine intolerance works and, more usefully, why freshness matters more than any single food on this page.
Last updated: 2026-07-20
Read this first: histamine builds up in food as it sits, so how old something is often matters more than what it is. Fresh chicken cooked today is fine; the same chicken eaten as leftovers tomorrow may not be. Cook, cool briefly, then freeze — the fridge is not slow enough.
High in histamine, or triggers/blocks its clearance. Leave these out during an elimination trial.
Depends on freshness, handling, or your own threshold. Try these one at a time, in small amounts.
Generally well tolerated when fresh. These are your everyday staples.
The pattern here is time and surface area. Histamine builds as meat ages, and it builds faster the more finely the meat is chopped — which is why a whole fresh cutlet is fine and the same meat ground into a spread is not.
This is the riskiest category and the one worth learning properly. Fish begins forming histamine within hours of being caught, and cooking does not destroy it — once it is there, it stays. "Fresh fish" at a counter has usually already been out of the water for days. Salmon and tilapia are not named by either source list — treat them as untested rather than assuming either tier.
One clean rule covers nearly all of it: the longer a cheese was aged, the more histamine it holds. Fresh, soft, white cheeses are fine; anything hard, sharp, blue, or "matured" is not.
Broadly an easy category. The exceptions involve yeast and long fermentation, not the grain itself.
Most vegetables are fine fresh or frozen. The list below is the short set of exceptions — everything not named here is generally well tolerated.
Ripeness matters as much as species. Histamine rises as fruit ripens, so the same fruit can be fine early in the week and a problem by the weekend. Avoid anything overripe or bruised.
Most nuts are a problem, with two clear exceptions. Note that seeds (pumpkin, sunflower, sesame) are not addressed by the source lists either way — treat them as untested rather than safe.
The easiest category on the list — nearly everything here is fine.
This is where most people get caught out, because these turn up as ingredients rather than as foods. Read labels — yeast extract and glutamate hide in stock cubes, crisps, and ready meals.
Cocoa is the thing to know about — it blocks the enzyme that clears histamine, so chocolate can worsen a reaction to a meal that was otherwise fine.
Alcohol is the single biggest item on this whole guide. It contains histamine, triggers release of your own, and blocks the enzyme that clears it — three mechanisms at once. If you try one change, this is the highest-yield one.
The background behind these ratings — DAO, the histamine bucket, and how to run an elimination trial properly.
Read the GuideIf your symptoms are mainly bloating and gas rather than systemic, the trigger may be carbohydrates instead.
View FODMAP Guide