Vidalia Onion (Raw)
Vegetables · Onions
Raw Vidalia onion has a low FODMAP portion of 22 g, approximately two tablespoons. The Monash entry lists 28 g as moderate and 75 g as high, with fructans responsible for the higher ratings. This guidance applies to Vidalia onion, rather than every onion described as sweet.
Serving sizes for vidalia onion (raw)
Raw Vidalia onion: 22 g low, 28 g moderate and 75 g high. Tablespoons and fractions of an onion are approximate.
Tested serving sizes
| Serving | Amount | Main FODMAP | Rating |
|---|---|---|---|
| 3/4 medium or 1/2 cup | 75 g | Fructans 0.3 g | |
| 2 tablespoons | 22 g | Fructans 0.09 g | |
| 2 1/2 tablespoons | 28 g | Fructans 0.11 g |
Breakdown for 75 g
Is vidalia onion (raw) low FODMAP?
The Vidalia entry shows moderate fructans at 28 g and high fructans at 75 g. Sweetness is not a substitute for those test results: a mild-tasting onion still needs a portion check. Its green serving differs from raw red onion, which has a separately verified 10 g low FODMAP portion.
Vidalia Onion (Raw) and IBS: what to know
For a Vidalia salad or sandwich, weighing a serving helps distinguish the listed 22 g amount from a thick slice or a heaped spoonful. If your food diary only says sweet onion, add the variety from the label when possible. The Vidalia result cannot determine a personal fructan tolerance or the rating of an unidentified sweet onion.
Gut-friendly ways to eat vidalia onion (raw)
Remove the outer peel and weigh your raw Vidalia portion before dicing it. Combine a measured amount with the other salad ingredients rather than estimating a fraction of a large bulb. In a shared recipe, calculate the onion per serving. This raw entry supplies no tested conversion for caramelised onion, onion powder or cooked sauces.
Frequently asked questions
Are all sweet onions low FODMAP at 22 g?
The 22 g green result belongs to the Vidalia variety in this raw entry. A label that only says sweet onion is not enough to establish the same tested portion.
How many tablespoons of Vidalia onion can I use?
The app describes 22 g as about two tablespoons and 28 g as about two and a half tablespoons. The first is green and the second amber, so grams are the clearer reference.
Can I use the Vidalia serving for raw red onion?
Use the red-onion guide instead: its green portion is 10 g. The two varieties have different entries and should not share a single allowance.
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Sources and editorial notes
- Monash University FODMAP Diet App
App entry checked directly on 27 September 2026: Onion, Vidalia, raw. Supports the listed portion weights, traffic-light ratings and FODMAP groups. The exact compound quantities shown in the catalogue breakdown were not verified by this app check.