Histamine Tracker
Onion
Onion is a fresh vegetable with no significant histamine content and no known histamine-raising effect.
Onions don't contain meaningful histamine and aren't typically associated with histamine liberation or DAO blocking.
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No fermentation, no problem — fresh onions haven't undergone the bacterial processes that cause histamine to accumulate, unlike pickled onions which are a different story
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Pickled vs. fresh — pickled or fermented onions are considerably higher in histamine due to the fermentation process, so the preparation makes a big difference here
Fresh onions are generally considered a safe, low-risk choice.
Track your reactions to onion in Histamine Tracker. Log meals and symptoms to spot the patterns that matter for your body.
For educational purposes only. Not medical advice. Consult a healthcare professional for personal guidance.
References
- SIGHI Food Compatibility List — SIGHI (2026)
- Histamine and histamine intolerance — Maintz & Novak (2007)
- Histamine Intolerance: The Current State of the Art — Comas-Basté et al. (2020)
- Low-Histamine Diets: Is the Exclusion of Foods Justified by Their Histamine Content? — Sánchez-Pérez et al. (2021)
- Histamine Intolerance: Symptoms, Diagnosis, and Beyond — Jochum (2024)
- Guideline on management of suspected adverse reactions to ingested histamine — Reese et al. (2021)