The glycemic index of blueberries is about 34. Blueberries are a kind of low-sugar fruit, the glycemic index is relatively low, probably only about 34, so diabetic or hyperglycemic patients can eat blueberries appropriately. The nutritional value of blueberries is relatively rich, mainly containing iron ions, vitamin C, vitamin E, etc., but also contains fiber, protein, carbohydrates, carotene, calcium, potassium, folic acid, phosphorus, etc., these nutrients are needed by the body, appropriate eating does not affect the effect of blood glucose control, but also has a certain benefit to diabetic patients. Foods with high sugar content, such as candies, chocolates, cheeses and cakes, should be limited after diabetes or high blood sugar is detected; high-fat and high-calorie foods also need to be limited. If you have any questions about your diet, it is advisable to consult your doctor promptly.