A glycemic-index food list provides a measure of how carbohydrate containing foods affect blood sugar levels. All foods are measured in relation to pure glucose, which is given a ranking of 100, states About.com.Continue Reading
The glycemic-index food list indicates which foods raise blood glucose levels the fastest and highest. However, the glycemic index does not account for portion size, which affects blood sugar levels as well.The glycemic load index takes both factors into account, according to About.com.
The glycemic index of a specific food varies among food lists, since many factors influence the results of the tests. These factors include differences between people tested, the laboratory techniques used, the recipes used and the fact that the carbohydrate content of an individual food type varies between servings, explains About.com.Learn more about Nutrition & Diets