Does toasting bread really lower glucose spikes?

Mar 08, 2025 Siddhartha Jana

Toasting reduces glucose spikes

By slowing the release of glucose and breaking down carbohydrates, toasting bread can reduce blood sugar spikes by more than 25%. Source: Canva

Calories stay the same

Since toasting has no effect on carbs, it has no effect on bread's calorie count. Source: Canva

Internal structure changes

Heating bread decreases moisture and modifies the starch structure, which some people find easier to digest. Source: Canva

Lower glycemic index (GI)

Compared to plain bread, toasted bread has a slightly lower GI, which helps control blood glucose levels. Source: Canva

Freezing further reduces glucose spikes

By creating resistant starch that is good for gut health, freezing and then toasting bread can reduce blood sugar spikes by 40%. Source: Canva

Minimal nutrient loss but potential hazards

Nutrients are not significantly affected by toasting. However, excessive amounts of acrylamide produced by burned bread can be hazardous. Source: Canva

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