Collard greens
Collard greens are a low-histamine leafy green with no known histamine-releasing or blocking properties.
Collard greens are simply a fresh vegetable — no fermentation, no aging, no known compounds that interfere with histamine processing.
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Why they're well-tolerated — they don't contain meaningful histamine, and unlike some foods, they don't prompt your body to release its own stored histamine either
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Freshness still matters — like any leafy green, they're best used soon after purchase; wilted or older greens can develop slightly higher biogenic amine levels
They're a solid, nutrient-dense green that tends to be easy to work with on a low-histamine diet.
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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)