What is glycemic index, and is it really important? The glycemic index (GI) is a measure of how quickly a carbohydrate-containing food raises the blood glucose level in the body. 👉Foods with a higher GI are rapidly digested and cause a quick spike in blood glucose. While those with a lower GI are digested slowly, leading to a gradual and steady increase in the blood sugar levels. 👉This concept is particularly relevant for individuals managing their blood sugar levels such as those with diabete