Key findings
- 1Even cereals with a short ingredient list, like Cheerios, are made by industrial extrusion
- 2In our analysis, breakfast cereals average a Processing Score of 6.2, which is Level 3
- 3Granola and muesli are typically less processed alternatives
Why is Cereal Level 3 on average?
Cereal extrusion involves mixing grain flour with water, sugar, and additives, then forcing it through a die at 150-180C under extreme pressure. This denatures proteins and starches, creating the puffed/shaped textures consumers expect. Because extrusion destroys vitamins, manufacturers add synthetic versions back (fortification). Additional ingredients include BHT (preservative), trisodium phosphate (pH regulator), and various artificial colors and flavors.
How 7,749 cereal products break down
Share of products at each processing level, in our analysis.
Cereal brand comparison
From least to most processed in our database.
How to read a cereal label
- 1
Short ingredient lists (5-6 items) indicate less processing: look for whole grain, sugar, salt
- 2
BHT "for freshness" is a synthetic antioxidant preservative
- 3
Fortified vitamins listed individually (like pyridoxine hydrochloride) indicate nutrients were destroyed and re-added
- 4
Grape-Nuts is one of few cereals that is baked rather than extruded
Which ingredients should you watch for?
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Frequently asked questions
Are Cheerios ultra-processed?
Although they have a relatively short ingredient list, Cheerios are produced via extrusion cooking and contain tripotassium phosphate and added synthetic vitamins. The O shape itself requires industrial processing. Search Cheerios to see their own average.
What is the least processed cereal?
Grape-Nuts (baked, not extruded), plain muesli (just mixed grains/nuts/fruit), and unflavored puffed wheat/rice (simple puffing) are among the least processed options.
Why are cereals fortified with vitamins?
Extrusion cooking destroys naturally occurring vitamins in grain. Manufacturers add synthetic vitamins back to maintain nutritional claims. This is why the vitamin list is so long on cereal boxes.
Guide · Breakfast
The Complete Breakfast Guide
Processing analysis, least-processed picks, and what to watch for.
Read guide