There is no international or domestic normal range for 1-hour postprandial glucose, but some studies have shown that 1-hour postprandial glucose should be less than 11.1 mmol/L, and 1-hour postprandial glucose should be less than 10.0 mmol/L in people with gestational diabetes.
Glucose in healthy people peaks between 30 minutes and 1 hour after eating, and then gradually declines, generally returning to normal within 2 hours. The blood glucose level gradually returns to normal. In people with abnormal glucose metabolism or diabetes, the peak of blood glucose is often delayed, i.e., it peaks only 1 hour after the meal.
Currently, national and international guidelines and consensus on non-gestational diabetes only define fasting blood glucose, 2-hour postprandial blood glucose, and random blood glucose values, and do not provide a reference for the normal range of 1-hour postprandial blood glucose (except in gestational diabetes), probably because food entering the body 1 hour after a meal is still being metabolized and transformed, and does not reach a steady state, and therefore does not fully account for blood glucose This may be because food entering the body 1 hour after a meal is still being metabolized and transformed and does not reach a steady state, and therefore does not fully describe the glycemic situation.
Some individual studies have shown that a blood glucose higher than 11.1 mmol/L 1 hour after a meal may indicate abnormal glucose metabolism.
In the specific population of gestational diabetes, studies have shown that high blood glucose has a greater impact on fetal growth and development than 10.0 mmol/L. Therefore, the 1-hour postprandial blood glucose in gestational diabetes should be less than 10.0 mmol/L.