Normal nighttime blood sugar levels need to be considered from two perspectives

At different times of the day, the body's blood sugar concentration is in a state of change. At night, people often measure their blood sugar. So, what is the normal value of blood sugar at night?

Normal fasting blood sugar

1. Generally, the fasting whole blood glucose level is 3.9-6.1 mmol/L (70-110 mg/dL), and the plasma glucose level is 3.9-6.9 mmol/L (70-125 mg/dL).

2. Fasting whole blood glucose ≥6.7 mmol/L (120 mg/dL) and plasma glucose ≥7.8 mmol/L (140 mg/dL), repeated twice can be diagnosed as diabetes.

3. When the fasting whole blood glucose is above 5.6 mmol/L (100 mg/dL) and the plasma glucose is above 6.4 mmol/L (115 mg/dL), a glucose tolerance test should be performed.

4. When fasting whole blood glucose exceeds 11.1 mmol/L (200 mg/dL), it indicates that insulin secretion is very low or lacking. Therefore, when fasting blood glucose increases significantly, diabetes can be diagnosed without other tests.

Normal blood sugar level after meal

1. One hour after meal: blood sugar 6.7-9.4 mmol/L. The maximum value is no more than 11.1 mmol/L (200 mg/dl).

2. 2 hours after meal: blood sugar ≤7.8 mmol/l.

3. 3 hours after meal: Return to normal after the third hour, and each urine sugar test is negative.