Histamine is a natural compound involved in immune and digestive processes, and it's also present in many foods. Some people seem to react to histamine from food with symptoms like bloating, diarrhea, headaches or flushing, often called histamine intolerance. It's a real but debated condition, and the low histamine diet is the main way it's managed.
What Is Histamine Intolerance?
Histamine intolerance describes a set of reactions to histamine that builds up from food, often linked to lower activity of diamine oxidase (DAO), an enzyme that breaks histamine down in the gut. Symptoms vary a lot (even in the same person after similar meals), which makes the condition hard to diagnose. There's no single reliable test; doctors usually rule out other conditions first, and a good response to a low histamine diet is considered the most practical confirmation.1
It isn't an allergy. A food allergy involves the immune system reacting to a specific protein, and it can be dangerous. Histamine intolerance is about the total amount of histamine and how well your body clears it.
Symptoms blamed on histamine overlap with allergies, IBS, celiac disease and other conditions. Get those checked before assuming histamine intolerance, and don't follow a restrictive diet long term without professional support.
Common Symptoms
Because histamine acts throughout the body, reported symptoms aren't limited to the gut:1
- Digestive: bloating, abdominal pain, diarrhea, nausea
- Skin: flushing, itching, hives
- Head: headaches or migraines
- Other: nasal congestion, a racing heart
Symptoms usually appear within a few hours of eating, and they tend to be worse when several histamine-rich foods are eaten together, such as cheese, cured meat and wine.
Histamine and IBS
People with IBS often report symptoms after histamine-rich foods such as wine, beer, cured meats and cheese.2 In a large analysis of food and symptom diaries, histamine-rich foods were associated with abdominal pain and diarrhea.3 This doesn't prove histamine is the cause, but it's one reason the topic comes up so often in IBS.
There's an important catch. Many histamine-rich foods are also high in FODMAPs or fat, and alcohol affects the gut in its own right. So a reaction to a cheese board with wine could have several explanations.
Foods Higher in Histamine
- Aged and ripened cheeses, such as parmesan, aged cheddar and blue cheese
- Cured, smoked and processed meats: salami, ham, bacon, chorizo
- Fermented foods: sauerkraut, kimchi, soy sauce, miso, vinegar
- Wine, beer and other fermented drinks, including kombucha
- Smoked, canned or not-fresh fish, including tuna, mackerel and sardines
- Leftovers kept for several days
- Some vegetables, such as spinach, tomato, eggplant and avocado
Some foods, such as citrus fruit and strawberries, are low in histamine themselves but are often said to trigger histamine release in the body. Evidence for this is limited, and lists disagree on them.
Foods Lower in Histamine
- Freshly cooked meat, poultry and fish (cooked soon after buying, or frozen fresh)
- Eggs
- Rice, potatoes, oats and quinoa
- Most fresh vegetables, such as carrot, zucchini, cucumber, lettuce and squash
- Many fresh fruits, such as apple, pear, mango and melon
- Fresh, non-aged dairy such as mozzarella or cream cheese, if you tolerate lactose
- Fresh herbs and most plain oils
Food lists differ between sources, because histamine content depends on freshness, storage and processing.
Freshness and Storage
Histamine forms as bacteria break down protein, so it builds up over time, especially in fish and meat. A few habits help:
- Buy fish and meat fresh and cook it the same day, or freeze it straight away
- Freeze leftovers in portions instead of keeping them in the fridge for days
- Choose fresh over canned, smoked or cured when you can
How a Low Histamine Diet Works
A low histamine diet is usually followed for a few weeks to see whether symptoms improve, then foods are reintroduced one at a time. DAO enzyme supplements are sometimes used alongside the diet, and antihistamines may be prescribed for a limited time, but the diet itself is considered the main treatment.1
- Elimination (2 to 4 weeks): cut back on high-histamine foods and focus on fresh foods. Keep a symptom diary.
- Review: if symptoms haven't improved, histamine is probably not your main trigger, and it's worth looking elsewhere.
- Reintroduction: if they have improved, bring foods back one at a time to find which ones and how much you tolerate.
Low Histamine vs Low FODMAP
The two diets target different things and don't line up neatly. Aged cheese, for example, is low FODMAP but high in histamine, while some fresh fruits, like apple and mango, are low in histamine but high in FODMAPs.
| Food | FODMAP | Histamine |
|---|---|---|
| Parmesan | Low | High |
| Apple | High | Low |
| Soy sauce | Low | High |
| Red wine | Low in a standard glass | High |
| Fresh chicken, rice, carrots | Low | Low |
If you have IBS, the low FODMAP diet has much stronger evidence. See our beginner's guide. It's best not to combine two restrictive diets without a dietitian, because the overlap of "allowed" foods gets very small and nutrition can suffer.
For cheese specifically, see our guide to low FODMAP cheese. To track how foods affect you, try an IBS food diary.
