Not Keto
Corn Flakes
23.80g net carbs per 1 cup
Poured over milk for breakfast, a single cup carries 23.8 g net carbs, which can use up most or all of a day's keto allowance in one bowl. Skip it and reach for eggs or a low-carb cereal alternative instead.
Built by Barron Hansen · Last updated July 2026
Nutrition Facts
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One serving uses 100% of your 20g daily budget.
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Good to Know
Standard Kellogg's Corn Flakes list milled corn, sugar, and malt flavoring, so even the plain version carries added sugar before you pour a drop of milk. Frosted and honey-coated variants push the sugar and net carbs even higher, and the usual 1 cup pour is easy to overshoot when you fill a normal cereal bowl. If you want that crunchy, flaky breakfast texture, look at almond-flour or coconut-based granolas instead, since corn cannot be made keto-friendly by portioning alone.
Is Corn Flakes Keto? The Full Answer
Corn Flakes contains 23.80g net carbs per 1 cup (24.60g total carbs minus 0.80g fiber). Poured over milk for breakfast, a single cup carries 23.8 g net carbs, which can use up most or all of a day's keto allowance in one bowl. Skip it and reach for eggs or a low-carb cereal alternative instead.
On a standard ketogenic diet, most people target 20-25g net carbs per day. A single serving uses 119% of a 20g daily carb limit. If you are following a strict ketogenic protocol, reach for a lower-carb option instead.
Better Keto Swaps
Try a bowl of Catalina Crunch cereal instead. It runs about 5 g net carbs per serving and gives you that same crunchy, spoon-and-milk routine without the sugar spike. Flaxseed and chia paired with a splash of unsweetened almond milk make a warm porridge that lands near 2 to 3 g net carbs, plus you get fiber and some healthy fat. Another solid pick is a handful of macadamia nuts (roughly 1.5 g net carbs per ounce), which keeps you full and skips the morning carb load entirely.
Track Your Ketone Levels
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