The sugar content of apple is 13.4g/ 100g, and the glycemic index is 36. Among several common fruits, the glycemic index of apples is relatively low. The glycemic index is called "glycemic index", which refers to the ratio of the area under the glycemic time curve caused by food containing 50 grams of carbohydrates to the area under the glycemic time produced by standard substances (usually glucose) multiplied by 100, reflecting the speed and ability of a certain food to raise blood sugar relative to glucose.