In general, grapefruit does not have a high glycemic level. Some studies have shown that grapefruit has a glycemic index of about 25, which is a low glycemic index food and can be consumed in moderation by diabetic patients who have better glycemic control. It should be noted that the glycemic index of a food is related to the ripeness and status of the fruit. If the grapefruit is already ripe, the sugar content may increase, leading to a higher glycemic index and making it a medium or high glycemic index food. If grapefruit is juiced, grapefruit juice also has a higher glycemic index and is not recommended for diabetics. Diabetic patients with poor or unstable blood glucose control are not recommended to consume any fruits, including grapefruit, and should wait until their blood glucose control is stable to consume them under the guidance of their doctors, or consume alternative fruits such as tomatoes and cucumbers. Proper diet is one of the most important aspects of diabetes treatment. It is best for every diabetic patient to formulate a reasonable dietary plan under the guidance of a professional, and to seek early medical attention if they feel unwell.