The glycemic index of different varieties of cornmeal does not vary much, and in general cornmeal buns have a glycemic index of about 70. Glycemic index represents the rate of blood glucose elevation per unit of time of a food. Cornmeal buns have a high glycemic index, so cornmeal buns belong to the food that rises in sugar faster. Consumption of cornmeal buns will cause blood sugar to rise, so cornmeal buns are not friendly to people with high blood sugar and intake should be controlled. Even for normal people, they should eat in moderation, and it is better not to eat too much. The blood sugar level can also be affected if you consume too much at a time. For more information on healthy eating for diabetics, consult a professional nutritionist.