Cilantro is not high in histamine. It’s generally considered well tolerated by people with histamine intolerance, though the data on its exact histamine content is limited. The Swiss Interest Group Histamine Intolerance (SIGHI), one of the most widely referenced resources for people managing histamine sensitivity, gives cilantro a compatibility score of 0, meaning no symptoms are expected at usual intake. That said, the same list notes that “only small amounts are well tolerated” and flags the histamine data as uncertain.
What the SIGHI Rating Actually Means
The SIGHI food compatibility list scores foods from 0 (well tolerated) to 3 (not compatible). Both fresh cilantro leaves and coriander seeds receive a 0, placing them among the safest options for people following a low-histamine diet. However, both entries carry a question mark in the histamine column, which indicates insufficient or contradictory data. In practical terms, this means cilantro hasn’t been reliably measured for histamine or other biogenic amines in published research, but what evidence exists hasn’t raised red flags.
The “small amounts” note is common for herbs and spices on the SIGHI list. It likely reflects the reality that most people use cilantro as a garnish or flavoring rather than eating it in large volumes, and that tolerance can vary from person to person.
Cilantro Contains Compounds That May Lower Histamine
Cilantro is a natural source of quercetin, a plant compound found in onions, apples, berries, and several herbs. Quercetin has been shown to stabilize mast cells, the immune cells that release histamine during allergic and inflammatory responses. In lab studies on human mast cells, quercetin reduced the release of both histamine and inflammatory signaling molecules like interleukins. It performed as well as or better than cromolyn, a pharmaceutical mast cell stabilizer, at blocking certain inflammatory pathways.
This doesn’t mean eating cilantro will treat histamine intolerance. The concentrations used in cell studies are far higher than what you’d get from a sprinkle of fresh leaves. But it does mean cilantro is unlikely to worsen histamine problems and may offer a small protective effect as part of a broader anti-inflammatory diet.
Fresh vs. Dried Cilantro
No published research has directly compared the histamine or biogenic amine content of fresh versus dried cilantro. In general, drying and aging can increase biogenic amine levels in some foods because bacteria have more time to convert amino acids into histamine and other amines. This is well documented in aged cheeses, cured meats, and fermented vegetables, but it hasn’t been specifically studied in dried herbs.
If you’re cautious, fresh cilantro is the safer bet. It has a shorter processing chain and less opportunity for bacterial amine production. Dried coriander seeds, which come from the same plant, also carry the same SIGHI score of 0, so they’re not considered problematic either.
When Cilantro Causes Symptoms Anyway
If you react to cilantro, histamine may not be the culprit. Cilantro belongs to the Apiaceae family, alongside celery, carrots, parsley, fennel, and caraway. People with mugwort pollen allergies can develop cross-reactive responses to foods in this family through what’s known as celery-mugwort-spice syndrome. The proteins in mugwort pollen (specifically profilins) are structurally similar to proteins in Apiaceae plants, so the immune system mistakes one for the other.
Symptoms of this cross-reactivity can include tingling or itching in the mouth, lip swelling, or throat tightness after eating cilantro, and they can easily be confused with a histamine reaction. The key difference is that this is a true allergic response driven by antibodies, not a problem with histamine breakdown. If cilantro consistently triggers oral symptoms, especially during mugwort pollen season in late summer and fall, a pollen-food cross-reaction is worth considering.
Using Cilantro on a Low-Histamine Diet
For most people managing histamine intolerance, cilantro is one of the easier herbs to include. It’s not fermented, not aged, and not on any major “avoid” list. A few practical tips can help you use it confidently:
- Use it fresh. Buy whole bunches and use them within a few days. Wilting or slimy leaves suggest bacterial growth, which can increase biogenic amines in any food.
- Start small. If you’re in an elimination phase, introduce cilantro in small amounts and track your response over 24 hours before increasing.
- Pair it with other low-histamine foods. Cilantro works well with rice, fresh vegetables, and grilled chicken, all of which are staples on a low-histamine diet. Problems more often arise from the dish cilantro is added to (salsas with tomatoes, curries with leftover meat) than from the herb itself.
Individual tolerance always varies with histamine intolerance. But based on the available evidence and its classification on the SIGHI list, cilantro sits firmly on the safe end of the spectrum.