Tim Hortons Long John
A Long John is high in histamine, driven by its cocoa topping.
Fast food is cooked in batches and held warm rather than made when you order it, so it is rarely as fresh as something cooked at home. That matters here because histamine builds up as protein foods sit, which means the same item can affect you differently depending on how long it waited.
A Long John is a rectangular yeast-raised donut made from enriched flour, shortening, sugar, and whey, topped here with a chocolate coating.
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Cocoa carries the level — the chocolate topping uses cocoa, which is high in histamine and pushes the whole pastry up.
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Yeast and the flours add more — the enriched flour, wheat starch, and yeast each sit at moderate, so the dough itself is not neutral here.
A plain, unglazed yeast donut from the same case is the lower-histamine direction if you want a treat.
This rating comes from Tim Hortons' own published ingredient statement, read on August 23, 2026. Restaurant recipes vary by location and change over time, so always check the current listing: source 1, source 2. How we rate foods →
Tim Hortons Long John and Tim Hortons are trademarks of their respective owners. This page is an independent histamine reference and is not affiliated with, endorsed by, or sponsored by the brand.
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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)