Is Onion (brown) Low FODMAP?
Onion (brown) is high FODMAP. It's best avoided during the elimination phase.
Serving thresholds
| Serving | FODMAP level | Data quality |
|---|---|---|
| 1 tbsp (12 g) | High | — |
| 1/2 (brown) (75 g) | High | — |
Thresholds are per sitting. FODMAP load stacks across a meal — two “low” servings of different foods can still add up.
Which FODMAPs are in onion (brown)?
During reintroduction, test the group above one at a time — tolerating onion (brown) depends on your personal threshold for Fructans, not on the food itself.
Good to know
High in fructans even in small amounts. Use chives or green tops of spring onion as a low-FODMAP alternative.
Low-FODMAP swaps for onion (brown)
Craving onion (brown) during elimination? These low-FODMAP picks from the same food group let you keep the dish without the trigger.
Related foods
This page is for informational purposes only and is not medical advice. FODMAP content varies with ripeness, processing, and brand. Always work with your doctor or a registered dietitian on dietary changes for IBS.