Glucose in the morning or at night to drink good need to be divided into circumstances, if it is for oral glucose tolerance test is recommended in the morning fasting and has been carried out a venous blood test blood glucose after taking, if it is used for the treatment of hypoglycemia and other diseases it is recommended to supplement the hypoglycemic episodes. Glucose is the body’s main source of calories and an important nutrient, and can be used to replenish body fluids in cases of vomiting, diarrhea, and major blood loss. Patients who require glucose supplementation are advised to standardize their medication under the supervision of a physician. If an oral glucose tolerance test is needed, it should be prepared in strict accordance with the doctor’s instructions and blood should be collected under the doctor’s guidance, and the results should be analyzed and evaluated by a professional doctor.