Is Fennel bulb Low FODMAP?
Fennel bulb is moderate FODMAP — it can fit a low-FODMAP diet, but only up to ½ cup sliced (48 g). Larger servings are likely to trigger symptoms.
Serving thresholds
| Serving | FODMAP level | Data quality |
|---|---|---|
| ½ cup sliced (48 g) · cooked | Low | Lab-tested |
| 1 cup sliced (110 g) · cooked | High | Lab-tested |
Thresholds are per sitting. FODMAP load stacks across a meal — two “low” servings of different foods can still add up.
Which FODMAPs are in fennel bulb?
During reintroduction, test the group above one at a time — tolerating fennel bulb depends on your personal threshold for Fructans, not on the food itself.
Good to know
A small slice of fennel bulb is fine; larger serves push fructans high.
Where these numbers come from
- Peer-reviewed paper: Muir JG et al. (2009) Measurement of short-chain carbohydrates in common Australian vegetables and fruits by HPLC. J Agric Food Chem 57(2):554–65.
- Peer-reviewed paper: Varney J et al. (2017) FODMAPs: food composition, defining cutoff values and international application. J Gastroenterol Hepatol 32(S1):53–61.
Phase derives serving thresholds from published research and food-composition data so every number is auditable.
Low-FODMAP swaps for fennel bulb
Craving fennel bulb 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.