Onion (white, raw)

TLDRLast updated 6 October 2026

Onion (white, raw): the low FODMAP reference is 10 g. Use raw white onion, not red onion, cooked onion or onion powder. Weigh small portions because ring and bulb sizes vary.

Serving sizes for onion (white, raw)

Onion, white, raw: 10 g low, 12 g moderate, 75 g high. Use the stated preparation and unit.

Low
10 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 Onion (white, raw) and their FODMAP ratings
ServingAmountFODMAP rating
10 g reference portion
12 g reference portion
75 g reference portion

Is onion (white, raw) low FODMAP?

The references for onion, white, raw are 10 g low, 12 g moderate, 75 g high. They are comparison portions, not exact transition cutoffs or personal tolerance limits.

Onion (white, raw) and IBS: what to know

For onion (white, raw), keep the exact form and amount in mind. Portion size and preparation affect how food references should be compared. Monash: FODMAP questions and food preparation. This public source supplies background, not verification of the numerical table.

Gut-friendly ways to eat onion (white, raw)

Use raw white onion, not red onion, cooked onion or onion powder. Weigh small portions because ring and bulb sizes vary. Compare Onion (Spanish/red, raw), Onion Powder, Green Onion / Scallion (green part only). These guides describe their own preparations and portions.

Frequently asked questions

What is the FODMAP portion for onion (white, raw)?

Onion (white, raw): 10 g low, 12 g moderate, 75 g high. These values apply to onion, white, raw.

How should I measure or check onion (white, raw)?

Use raw white onion, not red onion, cooked onion or onion powder. Weigh small portions because ring and bulb sizes vary.

Which other guides are useful when comparing onion (white, raw)?

Compare Onion (Spanish/red, raw), Onion Powder, Green Onion / Scallion (green part only). These guides describe their own preparations and portions.

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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.