Onion
Onion is high in FODMAPs and Oligosaccharides. If you're sensitive to any of these, check it against your profile before eating.
Intolerances
- FODMAPsHigh
onion and garlic are the richest sources of fructans and stay high FODMAP even in tiny amounts, and cooking does not remove the water-soluble fructans. Garlic- or onion-infused oil keeps the flavour while staying low FODMAP, as fructans don't dissolve into oil.
- OligosaccharidesHigh
- Histamine (+liberators / DAO inhibitors)None
- TyramineNone
- SalicylateNone
- SucroseNone
- LactoseNone
- SorbitolNone
- FructoseNone
- NickelNone
- OxalatesNone
- GlutenNo
Intolerance levels are based on our documented scientific sources. See sources →
React to FODMAPs? Check these too
More in Vegetables
- Artichoke→
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- Beet→
- Black beans→
- Broccoli→
- Brussels sprouts→
- Cabbage→
- Carrot→
- Cassava→
- Cauliflower→
- Celery→
- Chicory→
Frequently asked questions
Which intolerances does onion affect?
onion is notable for FODMAPs and Oligosaccharides.
Does onion contain FODMAPs?
Yes — onion is high in FODMAPs. onion and garlic are the richest sources of fructans and stay high FODMAP even in tiny amounts, and cooking does not remove the water-soluble fructans. Garlic- or onion-infused oil keeps the flavour while staying low FODMAP, as fructans don't dissolve into oil.
Does onion contain Oligosaccharides?
Yes — onion is high in Oligosaccharides. Amounts vary by brand and recipe, so always check the label of the exact product.