What is the Glycemic Index?
What is the glycemic index?
The Glycemic Index Diet was designed to help people with diabetes control their blood sugar levels. The diet focuses on carbohydrates, with the goal of eating foods that produce a steady rise in blood sugar instead of the spike in blood sugar created by eating foods that are quickly digested. Due to the high fiber content of most of such foods, those following the diet often feel fuller and are able to lose weight without feeling hungry.
Foods on the Glycemic Index Diet are scored on a scale of 0 to 100 based on how much they raise your blood sugar level. High-GI foods (with scores of 70 or higher) include white rice, white bread, pretzels, white bagels, white baked potatoes, crackers and sugar-sweetened beverages. Medium-GI foods (with scores of 56-69) include bananas, grapes, spaghetti, ice cream, raisins and corn. Low-GI foods (with scores of 55 and under) include oatmeal, peanuts, peas, carrots, kidney beans, hummus, skim milk and most fruits.
When eating according to the Glycemic Index Diet, you try to eat more foods in the low-GI category, and fewer in the high-GI group.
What are the potential benefits?
Studies of patients with type 1 diabetes (T1D) found replacing high-glycemic-index carbohydrates with low-glycemic-index carbohydrates improves blood sugar control and reduces hypoglycemic episodes. As a result, all the major diabetes organizations (including the American Diabetes Association, the Canadian Diabetes Association and Diabetes UK) advise people with diabetes—both type 1 and type 2—to use the Glycemic Index as a way to help healthfully manage their condition.
In addition, the Glycemic Index Diet also is associated with a reduction in a variety of chronic diseases, including heart disease.
What are the potential risks?
The Glycemic Index Diet can be confusing, since some healthy foods have a much higher glycemic value than unhealthy foods. In addition, the glycemic index does not account for the typical serving size of foods consumed, which can make it complicated to use.
What about the Glycemic Index Diet and type 2 diabetes (T2D)?
The existing evidence suggests that replacing carbohydrates higher on the glycemic index with carbohydrates lower on the glycemic index reduces the risk of developing type 2 diabetes. In addition—just like for those with T1D—the Glycemic Index Diet can help those with T2D more easily manage their blood sugar levels.
