Are leeks low FODMAP?
It depends on the type
It depends on the part. Leek leaves (the green tops) are low FODMAP and a good onion substitute, but the white bulb is high in fructans.
Moderate FODMAPLast reviewed October 24, 2026
Leeks by type
| leek leaves |  Low FODMAP | No major FODMAPs |
| green leek | Low FODMAP | No major FODMAPs |
| leek bulb (white part) |  High FODMAP | Fructan |
Leeks on a low FODMAP diet
- Leeks cover several products with different FODMAP levels, so check the type in the table above.
- Stick to the low FODMAP types during the elimination phase and test the others during reintroduction.
- Several FODMAP sources in one meal can add up, an effect called FODMAP stacking.
Which FODMAPs are in leeks
Fructan: Fructans are chains of fructose found in wheat, garlic, onion and some vegetables. People can't fully digest them, so they reach the large intestine, where gut bacteria ferment them. Read more about high FODMAP foods to avoid with IBS.
Lower-FODMAP swaps
More vegetables
Common questions
Are leeks low FODMAP?
It depends on the part. Leek leaves (the green tops) are low FODMAP and a good onion substitute, but the white bulb is high in fructans.
Which FODMAPs are in leeks?
Leeks contain fructans. Fructans are chains of fructose found in wheat, garlic, onion and some vegetables. People can't fully digest them, so they reach the large intestine, where gut bacteria ferment them.
Can I have leeks during the low FODMAP elimination phase?
It depends on the type. Choose the low FODMAP types listed above and test the others during reintroduction.
What can I use instead of leeks?
Lower-FODMAP options include leek leaves, scallion greens and chives.
Category
Vegetables & Mushrooms · Vegetable
FODMAP levels in the Stummy database are based on published FODMAP research and describe typical servings. Your own tolerance can differ. Looking for something else? Check any food in the FODMAP checker or browse the full food list.
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