Patients with high blood sugar generally have no clear-cut fruits that cannot be eaten, but it is not recommended to consume fruits with high glycemic index, and it is possible to eat fruits with appropriate glycemic index, such as apples and peaches. If patients with high blood sugar consume fruits with high glycemic index, it may cause large fluctuation of blood sugar. Therefore, it is recommended to prioritize some low glycemic index fruits, such as apple, with a glycemic index of 36; peach, with a glycemic index of 28; and grapefruit, with a glycemic index of 25. It is important to note that even low-glycemic index fruits should be consumed in moderation, as large amounts may cause significant fluctuations in blood glucose. For patients diagnosed with hyperglycemia, it is recommended to refer to the doctor’s advice on diet and follow the doctor’s instructions for treatment.