about this adFrom Wikipedia, the free encyclopedia The glycemic index, glycaemic index, or GI is the measurement of glucose (blood sugar) level increase from carbohydrate consumption. Foods raise glucose to varying levels. It estimates how much each gram of available carbohydrate (total carbohydrate minus fiber) in a food raises a person's blood glucose level following consumption of the food, relative to consumption of pure glucose. Glucose has a glycemic index of 100, by definition, and other foods have a lower glycemic index. Glycemic index is defined for each type of food, independent of the amount of food consumed. Glycemic load accounts for the amount of food consumed and is calculated in terms of glycemic index.