Eating at 12 p.m. in the morning may result in high blood glucose. The measurement of fasting blood glucose requires no calorie intake for at least 8 hours, and eating at 12 p.m. with too short an interval to the morning may result in elevated blood glucose. Therefore, eating at 12 p.m. will have an effect on the next morning’s fasting blood glucose, and the fasting blood glucose value detected at this time will not be accurate. Eating at 12 p.m. can have many adverse effects on the body. At night the intestines and stomach that should be resting start working again, increasing the burden on the intestines and stomach and easily causing indigestion. The night snack is too short a time from bedtime, and the food is difficult to be fully digested leading to food hoarding, which may lead to an increased risk of obesity in patients. Therefore, it is recommended to try not to eat at 12:00 p.m., 12:00 p.m. eating in the morning when the situation of high blood sugar should go to the hospital, improve the examination in a timely manner to clarify the diagnosis, under the guidance of the doctor for formal treatment.