Cornflakes
Grains · Breakfast Cereals
Cornflakes: 27 g is low FODMAP; 30 g is moderate FODMAP; 33 g is high FODMAP. One reference cup weighs 30 g. The separate US preparation has a different serving profile.
Last updated 22 September 2026Serving sizes for cornflakes
Cornflakes: 27 g is low FODMAP; 30 g is moderate FODMAP; 33 g is high FODMAP. One reference cup weighs 30 g. The separate US preparation has a different serving profile.
Tested serving sizes
| Serving | Amount | Main FODMAP | Rating |
|---|---|---|---|
| 1 cup | 30 g | Fructans 0.1 g | |
| 27 g portion | 27 g | Fructans 0.02 g | |
| 33 g portion | 33 g | Fructans 0.3 g |
Breakdown for 1 cup
Is cornflakes low FODMAP?
All six FODMAP groups are low at 27 g. Fructans are moderate at 30 g and high at 33 g; the other five groups remain low. These traffic-light portions do not provide measured component gram amounts.
Cornflakes and IBS: what to know
Use the preparation and portion together. A low FODMAP rating does not guarantee individual symptom tolerance. Added ingredients and different product recipes can change the profile.
Gut-friendly ways to eat cornflakes
Weigh the cereal before adding milk or toppings. Use the specific preparation or product profile; the general cornflake and US entries have different reference portions.
Frequently asked questions
What are the FODMAP serving sizes?
Cornflakes: 27 g is low FODMAP; 30 g is moderate FODMAP; 33 g is high FODMAP. One reference cup weighs 30 g. The separate US preparation has a different serving profile.
Do US cornflakes have the same profile?
The separate US preparation is low at 16 g, moderate at 19 g and high at 30 g, with fructans driving the ratings. Brand-specific products can also differ.
How should I measure a portion?
Weigh 27 g for the low reference portion. The primary cup measure is 30 g, which is a moderate portion for this preparation.
Does the rating include milk and toppings?
These portions apply to the cereal itself. Milk, fruit, sweeteners and other additions have their own preparation and portion profiles.
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