Is Subway Tuna Salad High in Histamine?

Subway Tuna Salad

High histamine

Subway's tuna salad is high in histamine because it is built on canned tuna mixed with lemon juice concentrate.

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 canned tuna blended with mayo-style ingredients, and a couple of those parts run high.

Canned tuna leads — canned and held fish tends to be high in histamine, and that is the base of the whole salad.
Lemon juice concentrate adds to it — citrus is a classic histamine liberator, so it keeps the level up even before the soybean oil, which is moderate.

If you want a lower-histamine choice from the same menu, a fresh option like a plain chicken or turkey sub tends to be gentler.

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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