Cheerios vs Corn Flakes:
Which Is Gluten-Free?
Two classic cereals, two different problems: Cheerios hinge on contested oat purity claims, while classic Corn Flakes are disqualified outright by barley malt.
Cheerios is the safer celiac choice — Cheerios depends on the brand or preparation, while Corn Flakes contains gluten.
Verdicts last reviewed July 2026 · based on FDA gluten-free labeling rules and Celiac Disease Foundation guidance
Cheerios
It depends. In the US, Cheerios are labeled gluten-free, but several celiac organizations advise caution due to how the oats are tested.
Watch out for:
- Mechanical oat-sorting may not guarantee consistent <20 ppm
- Non-US Cheerios can contain barley
- Avenin sensitivity affects ~8% of celiacs regardless
Corn Flakes
No. Standard corn flakes (like Kellogg’s) contain barley malt flavoring, so they are not gluten-free despite being corn-based.
Watch out for:
- "Malt flavoring" is barley-derived and contains gluten
- Corn base misleads shoppers into assuming it’s safe
- Frosted/flavored versions add more risk
Gluten-free swaps
Instead of Cheerios:
Instead of Corn Flakes:
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