Diabetic patients can eat sugar-free coarse grain buns, but in moderation. Coarse grain buns are rich in dietary fiber, and dietary fiber can play a role in enhancing satiety, relieve constipation, maintain intestinal health, etc., and coarse grain buns are also able to provide heat for the body, so diabetic patients can eat appropriate coarse grain buns. However, some coarse grain buns sold on the market contain a certain amount of sugar, diabetic patients should choose sugar-free coarse grain buns, to help maintain blood sugar stability; and, diabetic patients are not recommended to eat a large number of coarse grain buns at once, in order to avoid indigestion and other uncomfortable symptoms. Patients diagnosed with diabetes should actively cooperate with their doctors to maintain a low-salt, low-fat and low-sugar diet. Seek prompt medical attention when abnormal blood sugar levels are detected.