Firehouse Subs Broadway Basil & Tomato Bisque
This tomato bisque is high in histamine, driven by the tomato puree and chicken stock.
Food here is usually assembled to order from components that were prepped earlier in the day, so it tends to be fresher than a drive-through and less fresh than cooking at home. Histamine builds up as protein foods sit, so how long the chicken or beef has been in the warmer matters as much as what is in the bowl. Treat the rating above as a starting point.
Firehouse Subs Broadway Basil & Tomato Bisque is high in histamine. It is built on tomato puree, one of the best known histamine liberators, along with chicken stock, and the tomato base is not something that can be separated from the soup.
Why firehouse subs broadway basil & tomato bisque is rated high
This is the classic case where a soup made from fresh-sounding ingredients still gets flagged, and the reason is worth understanding. Tomato is a liberator, meaning it does not have to carry much histamine itself to cause trouble: it can prompt your body to release histamine it is already storing. That is why a bright, freshly made tomato soup can land people in the same place a cured sausage does, and why the usual advice about freshness does not rescue it. The concentrated tomato puree is the base of the whole bisque. On top of that, chicken stock also runs high, and long-simmered stocks that are held warm tend to run higher still, which comes from the freshness of what went in and the holding, not from the simmering itself. Cream, butter, and whey protein concentrate make it a dairy-heavy soup as well, and the enriched wheat flour adds a moderate note.
What changes your risk
- Tomato puree is the soup — it is a liberator and it is the base, so there is no version of this bisque where it plays a small role.
- Liberator does not mean spoiled — a fresh, well-made batch can still set off a reaction, because the issue is your own stored histamine being released rather than histamine sitting in the pot.
- How long the kettle has been held matters — this soup contains cream, chicken stock, chicken fat, and whey protein concentrate, so it is protein-rich, and a batch held warm for a long stretch is a bigger risk than one recently made. Late in the day generally means longer holding.
- Reheating does not undo anything — heat can kill bacteria but it does not remove histamine that has already formed, and it does nothing at all about the liberator effect of the tomato.
- The dairy stacks on top — cream, butter, and whey protein concentrate mean this carries a dairy load alongside the tomato, which matters if dairy is already a sore spot for you.
Lower-histamine alternatives
Firehouse Subs publishes only two lower items, Apple Juice and Fries, and neither one is a soup, so the honest answer is that there is no lower-histamine version of this in the same role on their menu. If you want something warm and tomato-free, the menu does not offer it on that list. Away from this chain, the non-liberator route for a comforting bowl generally means something built on plain rice, fresh cooked poultry, or fresh non-liberator vegetables rather than a tomato base.
How to lower the risk
Firehouse Subs is a build-to-order counter, but nothing in this bisque is published as removable, so there is no way to order it without the tomato puree or the cream. That makes it a skip-or-not decision rather than a customization one. If you do want something from the lower list, Apple Juice and Fries are what is published. It is also worth knowing that a soup like this is held hot in a kettle through the day, so if you are with someone ordering it, earlier in the service is a fresher batch than the end of the evening.
Common questions
Why is a fresh tomato soup high in histamine?
Because tomato is a histamine liberator. It can trigger your body to release histamine it already stores, so the soup can cause symptoms even when the ingredients are fresh and the batch is new.
Does cooking the tomato reduce the problem?
No. Cooking does not remove the liberator effect, and concentrating tomato into a puree does not make it milder. The rating stays high whether the tomato is raw or simmered.
Is the chicken stock part of why this is high?
Yes. Chicken stock is scored high here, and long-simmered stocks that are held warm tend to run higher, which comes down to the freshness of the ingredients that went in and how long the stock is kept hot rather than the cooking time itself.
Is there a lower-histamine soup at Firehouse Subs?
Not on their published lower list, which is Apple Juice and Fries. There is no soup on that list, so this one does not have a like-for-like swap at the chain.
This rating comes from Firehouse Subs' own published ingredient statement, read on August 11, 2026. Restaurant recipes vary by location and change over time, so always check the current listing: source 1, source 2. How we rate foods →
Firehouse Subs Broadway Basil & Tomato Bisque and Firehouse Subs 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)