Is Subway Parmesan Oregano Bread High in Histamine?

Subway Parmesan Oregano Bread

High histamine

This bread is high in histamine because it is topped with aged parmesan over a wheat and yeast loaf.

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.

Dairy Gluten

It is a loaf of wheat flour, yeast, sugar, salt, parmesan cheese, and oregano.

Parmesan cheese — parmesan is a hard, aged cheese, and that long aging builds up a lot of histamine, which is the main driver here.
The base loaf — the wheat flour and yeast sit at moderate, so the parmesan topping is what pushes the whole thing to high. The oregano is minor.

Without the parmesan crust, a plainer loaf sits noticeably lower.

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 →

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