FODMAP food guide
Is cornflakes low FODMAP?
FODMAP score
35
Moderate
In small portions — Cornflakes is moderate in FODMAPs. Portion size decides whether it triggers symptoms.
FODMAPs present
Low-FODMAP serving
1/2 cup (15g) of a malt-free corn cereal
Becomes high FODMAP at
large bowl, or any serve of a barley-malt version
Pure corn is low-FODMAP, but most commercial cornflakes add barley malt extract (a Fructan source), so check the label and keep servings modest.
Seen a different rating somewhere else?+
Usually it's a portion difference, not a disagreement. This page scores cornflakes at a serving of 1/2 cup (15g) of a malt-free corn cereal; at large bowl, or any serve of a barley-malt version 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
Plain cornflakes stay low only at a modest half-cup bowl — the barley-malt flavouring used in most brands brings fructans along, so bigger bowls head into high territory with no reliable moderate band published. Gluten-free cornflakes made without malt stay low to roughly 50 g, and some certified low-FODMAP brands allow a full-cup serve; check the box for honey or fruit add-ins.
Bands reflect published FODMAP research for typical preparations — individual tolerance varies, especially mid-reintroduction.
Go deeper
Related foods — gentlest first
Green scores are the real swaps; matching numbers are just relatives, not alternatives.