Histamine Tracker
Tuna (frozen)
Tuna accumulates histamine rapidly after catch, and frozen tuna's safety depends heavily on how quickly it was frozen at sea.
Tuna is one of the fish most associated with histamine buildup — it's naturally high in the amino acid histidine, which bacteria convert to histamine quickly after catch.
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Frozen vs. fresh — freezing halts histamine production, but only if the fish was frozen very quickly after catch. Tuna frozen hours after landing may already have elevated levels locked in
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'Sashimi-grade' frozen tuna — this is typically frozen immediately at sea at very low temperatures, which tends to result in lower histamine than standard frozen tuna
Looking for tuna labelled as frozen-at-sea or sashimi-grade is generally a more reliable indicator of lower histamine levels.
Track your reactions to tuna (frozen) 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)