Is Firehouse Subs Marinara Sauce High in Histamine?

Firehouse Subs Marinara Sauce

High histamine

This marinara is high in histamine because it is built on tomatoes.

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.

Histamine Liberator

This is a tomato sauce made from crushed tomatoes with garlic, onion, spices, and a little soybean oil.

Tomato leads — both the marinara and the crushed tomatoes are high, and tomato is a classic histamine liberator whether cooked or raw.
The oil adds a touch — the soybean oil sits at moderate, but the tomato base is what firmly sets this high.

There is no real way to make a tomato marinara low, so it is one to know about.

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 Marinara Sauce 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.