What is the GI value of white bread?

What is the GI value of white bread?

• A. 50
• B. 75
• C. 100
• D. 125

Answer: (C)

Glycemic index shows how quickly the carbohydrate in a food raises blood glucose after eating, compared with pure glucose which is set at 100. White bread is made from refined flour and has little fiber, so it’s digested rapidly and releases glucose into the bloodstream quickly. That quick rise is why white bread is categorized as high GI. In many GI charts it sits in the high range, often shown near the top of the scale. In this question’s scale, the top value is 100 to represent glucose itself, so a high GI food like white bread is represented with a value of 100 to emphasize its rapid impact on blood sugar. Keep in mind that the exact number can vary slightly by testing method, but the key idea is that white bread produces one of the fastest glucose responses among common foods.

Glycemic index shows how quickly the carbohydrate in a food raises blood glucose after eating, compared with pure glucose which is set at 100. White bread is made from refined flour and has little fiber, so it’s digested rapidly and releases glucose into the bloodstream quickly. That quick rise is why white bread is categorized as high GI. In many GI charts it sits in the high range, often shown near the top of the scale. In this question’s scale, the top value is 100 to represent glucose itself, so a high GI food like white bread is represented with a value of 100 to emphasize its rapid impact on blood sugar. Keep in mind that the exact number can vary slightly by testing method, but the key idea is that white bread produces one of the fastest glucose responses among common foods.