Glycemic Load is the application of the glycemic index to a standard serving of food.
Remember, the glycemic index (GI) of a food is not based on commonly consumed portion-sizes of foods. Instead, GI is measured by giving volunteers a portion size sufficient to contain 50g of useable carbs.
Therefore the portion size of each GI-tested food will vary according to how much carbohydrate it contains. For example, carrots contain only about 7 percent carbs, so the test-portion of carrots eaten by the test-volunteer will be huge - about 1.5 pounds. Serving sizes of foods (like bread) which contain a higher percentage of carbs, will be smaller.
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