A fasting blood glucose of 73 mg/dl, or about 4.1 mmol/L, falls within the normal range of fasting blood glucose and is not serious. Fasting blood glucose refers to the blood glucose measured before breakfast after overnight fasting (at least 8-10 hours without any food, except water), and its normal range is 3.9-6.1mmol/L, so fasting blood glucose of 4.1mmol/L belongs to the normal blood glucose range. Fasting blood glucose is an important indicator for the diagnosis of glucose metabolism disorder. At present, to determine the state of glucose metabolism should be combined with fasting blood glucose, postprandial 2h blood glucose, glycated hemoglobin and other comprehensive judgment. It is recommended to have a reasonable diet and strengthen exercise to maintain normal blood glucose and keep healthy. The following is a list of the most important indicators of glucose metabolism,