Tuna salad
Tuna accumulates histamine faster than almost any other fish, and it rises further once mixed and refrigerated.
Tuna is one of the highest-risk fish for histamine — it's naturally high in histidine, the building block bacteria convert into histamine.
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Canned tuna — histamine forms from bacterial activity on raw fish before and during processing, not during shelf storage; heat sterilization kills the bacteria, but histamine is heat-stable and persists in the sealed can, so levels can vary widely between brands and batches
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Once mixed — combining tuna with mayo and leaving the salad to sit (even in the fridge) gives bacteria more opportunity to continue producing histamine, so freshly made is always better than day-old
If you enjoy tuna salad, making it fresh and eating it straight away rather than preparing it ahead tends to be the lower-risk approach.
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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)