What does the glycemic index of a food mean?
The glycemic index (GI) is a ranking of foods on a scale from 0 to 100 according to the extent to which they raise blood sugar levels after eating. Glucose is given a relative number of 100 to provide a baseline to which all others can be compared. For example, an apple has a glycemic index of 38 which is less than half that of glucose, but higher than soybeans (which have a glycemic index of 18). Other common foods and their corresponding glycemic indices are Corn Flakes (84), dark rye bread (80), and bananas (54).
