7 foods · 1 low GI

Glycemic index of breakfast cereals

Breakfast cereals vary widely. Puffed and flaked cereals like cornflakes and puffed rice are among the highest-GI foods tested, while muesli, granola and bran cereals are lower. Milk or yogurt and a handful of nuts lower the effect of any bowl.

Serving Level
Granolatoasted muesli 53 7 30 g Low
Bran flakeswheat bran flakes 63 10 30 g Medium
Shredded wheatShredded Wheat 67 14 30 g Medium
WeetabixWeet-Bix 71 15 30 g High
Cheeriosoat rings 75 14 30 g High
Cornflakescorn flakes 80 18 30 g High
Rice Krispiespuffed rice cereal 88 21 30 g High

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Sources: Atkinson FS et al. International tables of glycemic index and glycemic load values 2021. Am J Clin Nutr. 2021;114(5):1625–1632 · USDA FoodData Central · Methodology & sources · Data last reviewed 2026-09-29.