High Histamine Foods List: Complete Guide with Levels

Histamine intolerance symptoms are triggered by foods that either contain high levels of histamine, stimulate the body to release its own histamine, or block the DAO enzyme that clears histamine from the gut. This guide provides evidence-based histamine levels in mg/kg where available, practical risk ratings, and the mechanistic reason each food causes problems – so you can make informed decisions rather than following a blanket restriction list.

How are histamine levels measured in food?

Histamine content in food is expressed in milligrams per kilogram (mg/kg) or milligrams per litre (mg/L) for liquids. According to the landmark 2007 review by Maintz & Novak in the American Journal of Clinical Nutrition, symptoms typically begin when histamine intake exceeds 75-100 mg per meal in sensitive individuals – though people with low DAO enzyme activity may react to far smaller amounts. The European Food Safety Authority (EFSA) considers histamine levels above 200 mg/kg in fish a safety concern for the general population; people with histamine intolerance react at a fraction of this threshold.

High histamine foods – levels and risk table

Data compiled from: Maintz & Novak (2007); Kovacova-Hanuskova et al. (2015); EFSA histamine safety assessments.

Food	Histamine level	Risk level	Notes
Parmesan / hard aged cheeses	10-2,000 mg/kg	Very High	Level depends on ageing time; parmesan and aged cheddar are highest
Blue cheese (Roquefort, Stilton)	56-900 mg/kg	Very High	Mould cultures also trigger histamine release
Canned tuna	10-2,000 mg/kg	Very High	Widest range of any food – bacteria activity in canning varies enormously
Canned sardines / anchovies	100-1,000 mg/kg	Very High	Anchovy paste especially concentrated
Salami / pepperoni	20-500 mg/kg	Very High	Fermentation process generates histamine directly
Red wine	20-200 mg/L	Very High	Also blocks DAO enzyme; double mechanism
Sauerkraut	5-200 mg/kg	Very High	Highly variable by brand and fermentation time
Kimchi	5-150 mg/kg	Very High	Fermented fish paste versions highest
Fish sauce	160-400 mg/kg	Very High	Very concentrated; small amounts still high-load
Miso paste	20-130 mg/kg	High	Fermented soy; also a histamine liberator
Smoked salmon	20-130 mg/kg	High	Smoking + aging combined
White wine / champagne	5-40 mg/L	High	Lower than red wine but also DAO-blocking
Beer	0.5-17 mg/L	High	DAO-blocking effect is the main issue
Spinach (cooked)	30-60 mg/kg	High	Cooking concentrates histamine; raw lower
Tomatoes / tomato paste	5-22 mg/kg	Medium	Also a histamine liberator; double effect
Avocado	23 mg/kg	Medium	Plus histamine-liberating properties
Vinegar (wine vinegar)	4-15 mg/kg	Medium	Apple cider vinegar lower but still a liberator
Yoghurt / kefir	5-50 mg/kg	Medium	Live cultures continue producing histamine; varies by brand
Soy sauce	10-130 mg/kg	High	Fermented; tamari similar
Bone broth (slow-cooked)	Variable – high	High	Long cooking extracts histamine from collagen; not measured directly
Leftovers (meat/fish)	Increases over time	High	Histamine doubles every few hours at fridge temperature
Aubergine / eggplant	26 mg/kg	Medium	Particularly when cooked
Spinach (raw)	5-10 mg/kg	Medium	Lower raw, but still a liberator

What are histamine-liberating foods?

Histamine liberators are foods that contain little or no histamine themselves but trigger the release of histamine from mast cells in the gut wall. This is a separate mechanism from dietary histamine intake – it means even a very fresh, low-histamine food can cause symptoms if it has strong liberating properties. The combined load of dietary histamine plus liberated histamine is what pushes you over threshold.

Food	Liberating strength	Notes
Strawberries	Strong	One of the most potent liberators; small amounts affect sensitive individuals
Citrus fruits (oranges, lemons, limes, grapefruit)	Strong	Includes citrus juice; lemon in cooking counts
Pineapple	Strong	Also contains bromelain which may affect gut permeability
Kiwi	Moderate	Particularly when very ripe
Papaya / banana	Moderate	Riper fruit = stronger effect
Tomatoes	Strong	Both high histamine content AND strong liberator
Chocolate / cocoa	Strong	Theobromine triggers mast cell release; dark chocolate worst
Egg whites (raw)	Moderate	Cooked egg white is less liberating; yolk is safe
Shellfish	Strong	Also often high in histamine itself depending on freshness
Walnuts / cashews / peanuts	Moderate	Tree nuts generally more liberating than seeds
Alcohol	Strong	Liberates histamine AND blocks DAO – the strongest combined effect

What foods block the DAO enzyme?

DAO (diamine oxidase) is the primary enzyme responsible for breaking down dietary histamine in the gut. When DAO is blocked, histamine you eat cannot be cleared efficiently – even if your total histamine intake is moderate. DAO-blocking foods are particularly problematic because they increase your sensitivity to everything else you eat at the same time.

Food / substance	DAO-blocking effect	Notes
Alcohol	Severe	Blocks DAO directly and competitively; any amount is significant
Black tea / green tea	Moderate	Tannins inhibit DAO; herbal teas are generally safe
Energy drinks	Moderate	Combination of stimulants and additives
Certain medications	Varies	NSAIDs, some antidepressants, antihistamines (paradoxically) – discuss with GP

What foods are low in histamine and safe to eat?

The following foods are consistently low in histamine and not significant liberators. They form the foundation of a low-histamine elimination diet. The key principle throughout: freshness matters more than the food itself – fresh meat cooked immediately is safe; the same meat left overnight becomes a problem.

Category	Safe foods	Notes
Meat & fish	Fresh chicken, turkey, beef, lamb; fresh white fish	Cook and eat immediately; freeze anything not eaten within hours
Eggs	Cooked egg yolk	Avoid raw or lightly cooked egg white
Dairy	Butter, ricotta, mozzarella, cream cheese, pasteurised cream	Fresh, mild cheeses only – no aged or fermented
Grains	Rice, oats, quinoa, pasta (plain), bread (yeast-free or sourdough-free)	Avoid products with vinegar or yeast extract
Vegetables	Courgette, broccoli, cauliflower, sweet potato, carrot, garlic, onion, lettuce, cucumber, asparagus, peas	Most vegetables are safe; exceptions are tomato, spinach, aubergine, avocado
Fruit	Apple, pear, mango, melon, grapes, blueberries, coconut	Avoid citrus, strawberries, pineapple, kiwi, overripe fruit
Fats & oils	Olive oil, coconut oil, butter, most cooking oils	All oils are safe; avoid oil-based dressings with vinegar
Drinks	Water, herbal teas (peppermint, chamomile, rooibos), coconut water	Avoid alcohol, black/green tea, energy drinks
Herbs & spices	Fresh herbs (basil, parsley, chives, oregano), mild spices	Avoid cinnamon, chilli, cloves in excess

Why does freshness matter so much?

Histamine is produced by bacteria acting on the amino acid histidine in protein-containing foods. The longer food sits – at room temperature, in the fridge, or as leftovers – the more histamine accumulates. According to Kovacova-Hanuskova et al. (2015), histamine in fish can increase from safe levels to symptomatic levels within hours at room temperature, and continues to rise in the fridge over days. This is why freshly cooked chicken is tolerated but the same chicken reheated the next day causes symptoms – the histamine content has multiplied, not the food itself.

Practical rule: Cook fresh, eat immediately, freeze what you cannot eat. Leftovers are the single most common hidden trigger in histamine intolerance.

How to use this list in practice

This list is a starting framework for a 4-week elimination trial – the gold-standard diagnostic approach for histamine intolerance. During the elimination phase, remove all Very High and High-rated foods plus known liberators and DAO-blockers. After 4 weeks, reintroduce one food at a time over 3-day intervals, monitoring symptoms with the Histamine Food Diary & Tracker.

Important: Individual tolerance varies. The histamine levels above are averages – actual content in any specific product depends on brand, age, storage, and preparation. Use the Histamine Load Calculator to estimate your daily load across all meals rather than judging individual foods in isolation.

High histamine foods list: Common questions

What food has the highest histamine content?

Fermented and aged foods top the list. Hard aged cheeses (especially parmesan), canned fish (particularly tuna and anchovies), fermented vegetables (sauerkraut, kimchi), and cured meats (salami, pepperoni) all regularly exceed 200 mg/kg – the threshold EFSA considers hazardous even for the general population. Red wine typically ranges from 20-200 mg/L. Among these, canned tuna shows the widest variability: poorly handled batches can reach 2,000 mg/kg.

Are leftovers always high in histamine?

Yes – histamine accumulates in cooked protein as bacteria multiply, even in the fridge. A chicken breast cooked fresh and eaten immediately is low-histamine; the same chicken refrigerated overnight will have meaningfully higher histamine by the next day, and significantly higher after 48 hours. If you react to “safe” foods unpredictably, leftovers are the first variable to eliminate. Freeze rather than refrigerate if you are not eating within 2 hours of cooking.

Is spinach really high in histamine?

Yes, particularly when cooked. Raw spinach contains around 5-10 mg/kg of histamine; cooked spinach concentrates to 30-60 mg/kg. Spinach is also a histamine liberator – it triggers the release of endogenous histamine from mast cells independently of its own histamine content. This double mechanism makes it one of the more problematic vegetables despite its reputation as a health food. Baby spinach in small amounts is tolerated by some people; cooked spinach in larger quantities is consistently problematic.

What is the difference between high-histamine and histamine-liberating foods?

High-histamine foods contain preformed histamine – you are ingesting histamine directly and your DAO enzyme must break it down. Histamine-liberating foods (like strawberries, citrus, and chocolate) contain little or no histamine themselves but trigger mast cells in your gut to release histamine stored in your own tissues. Both increase your total histamine load, but through different mechanisms. For people with histamine intolerance, both categories require restriction during the elimination phase.

Can I eat tomatoes if I have histamine intolerance?

Tomatoes are a problem for two reasons simultaneously: they contain a moderate amount of histamine (5-22 mg/kg) and are also one of the strongest histamine liberators among vegetables. Fresh raw tomatoes cause reactions in the majority of people with confirmed histamine intolerance. Cooked tomatoes and tomato-based products (passata, ketchup, tomato paste) are more concentrated and reliably worse. Tomatoes are one of the first foods to restrict and one of the most reliable confirmation tests – if your symptoms improve significantly by removing tomatoes, histamine intolerance is very likely.

Is alcohol always a problem with histamine intolerance?

Yes – alcohol acts through three mechanisms simultaneously: it contains histamine (especially red wine and beer), it is a histamine liberator, and it directly blocks the DAO enzyme that breaks down dietary histamine. This triple mechanism makes alcohol the single most problematic substance in histamine intolerance. Even a single glass of wine can overwhelm the system of someone with low DAO activity. Spirits contain less histamine than wine or beer but still block DAO. There is no reliably safe alcohol for people with significant histamine intolerance.

Medical disclaimer: This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any elimination diet.