What does the Glycemic Index do?

The Glycemic Index (GI) is a ranking of carbohydrate-containing foods that indicates how quickly and significantly a particular food raises blood glucose levels after consumption. Foods with a high GI are rapidly digested and absorbed, leading to quick spikes in blood sugar, whereas those with a low GI are digested more slowly, resulting in a gradual increase in blood sugar levels. This ranking is particularly useful for individuals monitoring their blood sugar levels, including those with diabetes or those looking to maintain steady energy levels throughout the day.

In this context, the other options do not accurately describe the function of the Glycemic Index. The GI does not rank foods by their calorie content, nutritional value, or fiber content. Instead, its sole focus is on the impact of carbohydrates present in foods on blood sugar levels, making it a valuable tool in nutritional planning and management for individuals concerned with glycemic control.