Lettuce (Romaine/Cos)

TLDRLast updated 7 October 2026

Raw romaine, also called cos lettuce, is low FODMAP at 75 g. Fructose is moderate at 182 g and high at 244 g, while the other displayed FODMAP groups remain low.

Serving sizes for lettuce (romaine/cos)

Use 75 g of raw cos lettuce for the low reference. The 182 g moderate and 244 g high weights are larger-portion information, not serving targets.

Low
2 cupsabout 75 g
FructoseLow
LactoseLow
FructansLow
GOSLow
SorbitolLow
MannitolLow

Reference portions

Select an amount or rating to update your portion. These are reference portions, not exact cut-offs or recommended intakes.
Reference portions for Lettuce (Romaine/Cos) and their FODMAP ratings
ServingAmountFODMAP rating
2 cups
4 3/4 cups
6 1/2 cups

Is lettuce (romaine/cos) low FODMAP?

The larger references describe more lettuce, not a recommended salad size. These amounts apply to raw cos leaves and should not be used for butter lettuce, which has a different portion ladder. A green rating for the leaves also does not describe every ingredient in a Caesar-style salad.

Lettuce (Romaine/Cos) and IBS: what to know

When recording IBS meals, include the leaf weight and the dressing, croutons or other toppings. A large salad bowl can make it hard to judge how much is lettuce and how much is added food. Noting those components separately gives a clearer comparison between meals. Supporting background: Monash: Low FODMAP shopping list. General shopping context; not evidence for this exact variety or its full portion table.

Gut-friendly ways to eat lettuce (romaine/cos)

Drain washed leaves before weighing them, then tear or chop as needed. Portion the lettuce before adding dressing so the weight remains easy to measure. Whole cos leaves can also hold a filling, but check the filling’s ingredients and amount independently. If the salad uses a mixture of lettuces, look up the named varieties instead of applying the cos result to the entire bag.

Frequently asked questions

Are romaine and cos lettuce low FODMAP?

This entry covers both names for the raw lettuce preparation and lists 75 g as low FODMAP.

What changes in a larger serving of cos lettuce?

Fructose becomes moderate at 182 g and high at 244 g. Other displayed groups stay low at those portions.

Does the serving include salad dressing?

No. Weigh the drained raw leaves before dressing them, and assess the dressing and toppings as separate foods.

Can I use this amount for butter lettuce?

Use butter lettuce’s own guide. The two preparations have different larger-portion references, even though both can form a salad base.

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Sources and editorial notes

Published and maintained by Gut Friendly. This guide has not been independently reviewed by a dietitian. Serving information comes from our food catalogue. Where references are listed, they explain the research and preparation differences. Check the original source for current portions.

Gut Friendly provides general information, not medical advice.