Is Firehouse Subs Italian Salad Dressing High in Histamine?

Firehouse Subs Italian Salad Dressing

Moderate histamine

This dressing is moderate overall, with lemon juice concentrate as its highest-histamine part.

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

A vinaigrette-style dressing of soybean oil, vinegar, garlic, onion, and red bell pepper.

Lemon juice concentrate — this is a classic histamine liberator and the highest single ingredient in the mix, even though the dressing overall lands moderate.
Oil and red bell pepper — the soybean oil and the red bell pepper each add a moderate note alongside the base dressing.

Leaving it off keeps the liberator and the oil out of your meal.

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 Italian Salad Dressing 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.