Histamine in food is harmless to most people. It matters in histamine intolerance, where reduced DAO enzyme activity means dietary histamine can provoke symptoms such as flushing, headache or hives.
The foods below are the highest sources of histamine among the 125 foods in our database, ordered by mg per 100 g. Treat this as an orientation to which foods sit at the top of the range, not as a complete avoid-list — values vary with variety, growing conditions and preparation, and many foods have never been measured for histamine.
For how histamine behaves in the body, see the Histamine compound page.
Spinach — the top-ranked source
| Total Fat | 0.39 g |
|---|---|
| Saturated Fat | 0.06 g |
| Sodium | 79 mg |
| Potassium | 558 mg |
| Total Carbohydrate | 3.63 g |
| Dietary Fiber | 2.2 g |
| Total Sugars | 0.42 g |
| Protein | 2.86 g |
Foods highest in Histamine
- Spinach — 30.0 mg per 100g. Vitamin K, folate, iron
- Avocado — 23.0 mg per 100g. Folate, vitamin K, vitamin E
- Tuna (canned, light) — 20.0 mg per 100g. Selenium, vitamin B12, niacin
- Sardines — 15.0 mg per 100g. Omega-3, calcium (with bones), vitamin D
- Dark Chocolate (70–85%) — 10.0 mg per 100g. Iron, magnesium, copper
- Kefir — 8.00 mg per 100g. Probiotics (diverse strains), calcium, B12
- Greek Yogurt (plain, nonfat) — 6.00 mg per 100g. Calcium, vitamin B12, probiotics
- Tomato — 4.00 mg per 100g. Vitamin C, potassium, lycopene
- Eggs — 3.00 mg per 100g. Choline, vitamin B12, vitamin D
How to reduce Histamine in what you already eat
How to Reduce Histamine
Histamine accumulates as food ages and is not destroyed by cooking — freshness, not heat, is the lever.
| Method | Typical reduction | How it works |
|---|---|---|
| Eat fresh, skip leftovers | prevents buildup | Cook and eat promptly; freeze portions rather than refrigerating for days. |
| Choose unaged foods | lower load | Fresh meat and fish over cured, canned, aged or fermented products. |
| Fish frozen at catch | limits formation | Slows the bacterial conversion that generates histamine. |
Common questions
Is histamine bad for you? For most people, no. Histamine occurs naturally in everyday foods, and most of those highest in histamine are foods worth eating. They matter mainly to the minority managing a specific diagnosis, which is who this list is for.
Do I need to avoid these foods? Almost certainly not, unless a clinician has advised it for a specific diagnosis. Most of the foods on this list are nutrient-dense and worth eating; the ones at the top are simply where histamine concentrates.
Does cooking reduce histamine? Histamine accumulates as food ages and is not destroyed by cooking — freshness, not heat, is the lever. The table above sets out the specific methods and how much each one removes.
Scientific references & clinical evidence
This guide is built on peer-reviewed research — verify the primary sources below.
