35/100

Grains & Bread

Cornflakes

Poor — Cornflakes works against fat-burning.

One of the highest-GI breakfast foods; almost no fiber to slow it down.

The breakdown

Per serving: 1 cup (30g)

Glycemic load
19
Sugar (g)
3
Fiber (g)
1
Protein (g)
2

Glycemic index 81 · Carbs 24g · Fat 0g · Processing ultra-processed

What this means for fat-burning

A FatTonic Score of 35 places cornflakes in the Poor band. The score is dominated by its glycemic load of 19 (moderate — a noticeable but manageable rise).

Being ultra-processed, it is also easy to overeat.

See how your whole day scores — free Metabolic Score →

Frequently asked questions

Does cornflakes spike insulin?

Cornflakes has a glycemic load of 19 and a FatTonic Score of 35 out of 100, which means it works against fat-burning. One of the highest-GI breakfast foods; almost no fiber to slow it down.

Is cornflakes good for fat loss?

With a FatTonic Score of 35/100 (Poor), cornflakes works against fat-burning. One of the highest-GI breakfast foods; almost no fiber to slow it down.

Better swaps

100
AvocadoExcellent · GL 0
100
BroccoliExcellent · GL 1
100
SpinachExcellent · GL 0

More grains & bread

75
Whole Grain BreadGood · GL 10
73
Oatmeal (Rolled Oats)Good · GL 13
65
Sourdough BreadGood · GL 11
64
QuinoaGood · GL 18