Is Subway Yellow Mustard High in Histamine?

Subway Yellow Mustard

High histamine

Subway's yellow mustard is high in histamine, driven by the mustard and vinegar.

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.

This mustard is water, vinegar, mustard seed, salt, turmeric, paprika, spices, and garlic powder.

Mustard and vinegar carry it — the prepared yellow mustard is high, and the vinegar adds to that, which is what puts this sauce at a high level.
Paprika in the mix — the paprika sits at moderate, so even setting the mustard aside there is more than one thing keeping this up.

For a lower-histamine finish, a plain oil dressing is the safer swap.

This rating comes from Subway's own published ingredient statement, read on August 10, 2026. Restaurant recipes vary by location and change over time, so always check the current listing: source 1, source 2. How we rate foods →

Subway Yellow Mustard and Subway 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.