FODMAP food guide
Is fennel bulb low FODMAP?
FODMAP score
25
Low FODMAP
Yes — Fennel Bulb is low FODMAP in normal servings and is generally well tolerated by people with IBS.
FODMAPs present
Low-FODMAP serving
1/2 cup (48 g)
Becomes high FODMAP at
1 cup (100 g) or more
Though botanically an umbellifer, often scanned with alliums; low in small servings, with Fructans rising in larger amounts.
Seen a different rating somewhere else?+
Usually it's a portion difference, not a disagreement. This page scores fennel bulb at a serving of 1/2 cup (48 g); at 1 cup (100 g) or more it belongs in the high band. A source quoting the larger serve will call it high, and one quoting the smaller will call it low — the same food, measured at two different amounts.
Based on published FODMAP research and reviewed reference data. Informational only — not medical advice. Tolerance is individual; verify with a dietitian during the elimination phase.
How much is OK?
This food's verdict depends on the serving. The bands below show where the load builds, group by group.
Fructans
Figures are for the raw bulb; lab results vary noticeably between batches — some raw-bulb tests pass at larger serves, others flag them — so treat portions past 3/4 cup cautiously. A little mannitol rides along with the fructans. The feathery green fronds are far more forgiving than the bulb and work freely as a garnish.
Bands reflect published FODMAP research for typical preparations — individual tolerance varies, especially mid-reintroduction.