Fish Sauce

Herbs & Spices · Cooking Aids

TLDRLast updated 6 October 2026

Fish Sauce: the low FODMAP reference is 20 ml. Measure the regular fish sauce in millilitres; vegan fish sauce has a different reference profile.

Serving sizes for fish sauce

Sauce, fish: 20 ml low, 100 ml moderate, 152 ml high. Use the stated preparation and unit.

Low

20 mlabout 1 tablespoon

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 Fish Sauce and their FODMAP ratings
Serving	Amount	FODMAP rating
20 ml reference portion
100 ml reference portion
152 ml reference portion

Is fish sauce low FODMAP?

The references for sauce, fish are 20 ml low, 100 ml moderate, 152 ml high. They are comparison portions, not exact transition cutoffs or personal tolerance limits.

Fish Sauce and IBS: what to know

For fish sauce, keep the exact form and amount in mind. Check the complete ingredient list when comparing products. Gluten-free or similar front-of-pack wording is not a portion-specific FODMAP assessment. Monash: ingredient labels and FODMAPs. This public source supplies background, not verification of the numerical table.

Gut-friendly ways to eat fish sauce

Measure the regular fish sauce in millilitres; vegan fish sauce has a different reference profile. Compare Fish Sauce (Vegan), Tamari (Gluten-Free Soy Sauce). These guides describe their own preparations and portions.

Frequently asked questions

What is the FODMAP portion for fish sauce?

Fish Sauce: 20 ml low, 100 ml moderate, 152 ml high. These values apply to sauce, fish.

How should I measure or check fish sauce?

Measure the regular fish sauce in millilitres; vegan fish sauce has a different reference profile.

Which other guides are useful when comparing fish sauce?

Compare Fish Sauce (Vegan), Tamari (Gluten-Free Soy Sauce). These guides describe their own preparations and portions.

Check a whole plate in seconds.

Not sure about a whole meal? Scan it with the Gut Friendly app.

Get the app

Fish Sauce (Vegan)CondimentsLow Tamari (Gluten-Free Soy Sauce)ProcessedLow

Sources and editorial notes

Monash: ingredient labels and FODMAPs
Supports checking formulations and distinguishing gluten-free claims from low FODMAP; does not verify this product or its numerical portions.

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.