Firehouse Subs Catering Salad Chopped Deluxe Tuna Salad

High histamine

This tuna salad is high in histamine because of the tuna salad, tomatoes, and provolone.

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 Dairy

It is lettuce, cucumber, red onion, and tuna salad with several higher-histamine additions.

Tuna salad, tomatoes, and provolone — the tuna salad is high, aged provolone is high, and tomato is a classic liberator, so each one lifts the level.
Green peppers — these land moderate, part of the picture but not the main issue.

The lettuce and cucumber are the mild base, though the tuna keeps this one firmly high.

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 Catering Salad Chopped Deluxe Tuna Salad 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.