Elderly diabetic patients should choose fruits with low glycemic index to eat under the premise that the total daily dietary calories remain unchanged, in order to avoid a significant increase in blood sugar after eating. Fruits with low glycemic index include sage fruits, guava, cherries, etc. Before considering which food to choose, elderly diabetics should calculate their total daily caloric needs based on their weight and daily activity intensity, and then distribute the calories to each meal. Determine the portion size of each type of food, and then choose the type and amount of fruit to eat on this premise, so that excessive calorie intake will not lead to blood sugar overload. Each type of food has its own glycemic index, which is the amount of blood sugar that can be raised by the same amount of food. The higher the glycemic index, the higher the glycemic capacity of the food. Take fruits for example, different fruits can also be divided into three levels of glycemic index: low, medium and high. When choosing fruits for elderly diabetic patients, choosing fruits with low glycemic index can avoid a significant increase in blood sugar after meals. Some elderly diabetic patients have blood sugar over 10mmol/L, which means that the blood sugar control is not ideal. In this case, it is not suitable to eat fruits for the time being, and they should go to the endocrinology department for consultation, so that they can choose suitable fruits after their blood sugar is controlled to the standard. Elderly diabetic patients need to eat fruits under the premise of ideal blood sugar, and choose the type of fruits within the limit of total daily dietary calories, and the type of fruits with low or medium glycemic index is appropriate.