Most of the energy required by the human body for life activities comes from blood sugar, which is of great significance for maintaining the normal activities of the body, whether the blood sugar level is too high or too low, it will cause physical discomfort and even cause diseases, affecting physical health.
Therefore, to stay healthy, blood sugar must be maintained at a normal level. When discussing blood glucose levels, fasting blood glucose is an important reference index, which is not only one of the criteria for diagnosing diabetes, but also an important reference standard for judging blood sugar levels.
So what is the standard value of fasting blood sugar, and how much is fasting blood sugar above to be diagnosed as diabetes?
In general, the reference range for fasting blood glucose is 3.9 to 6.1 mmol/L (70 to 110 mg/dL), while the normal reference range for plasma blood glucose is 3.9 to 6.9 mmol/L (70 to 125 mg/dL).
If the fasting blood glucose exceeds 5.6 mmol/L and the plasma blood glucose exceeds 6.4 mmol/L, a glucose tolerance test should be performed.
Diabetes mellitus can be diagnosed if the fasting blood glucose is higher than or equal to 6.7 mmol/L and the plasma blood glucose is higher than or equal to 7.8 mmol/L during the blood glucose test.
The fasting blood glucose value mentioned above is obtained by drawing venous blood in the morning in a completely fasting state, and compared with the blood glucose value measured by the blood collected from the fingertips at any time, the fasting blood glucose value is more standard and has more reference value.
Therefore, if you want to check whether your blood sugar level is normal and whether you have diabetes, you must go to the hospital in the morning to draw venous blood for laboratory tests in a completely fasting state, instead of making a judgment by measuring it yourself through a home blood glucose meter, which is likely to lead to wrong judgment results.
In addition, in clinical practice, in addition to paying attention to fasting blood glucose, postprandial blood sugar is also of reference significance when judging whether diabetes is present.
Because many diabetic patients do not have a high fasting blood sugar value, but the postprandial blood sugar level remains high, so if you only pay attention to fasting blood sugar and ignore postprandial blood sugar, it is likely that you have already developed diabetes but do not know it, and delay treatment. So what is the standard value of blood sugar after a meal?
Postprandial blood glucose is measured at three time points: one hour postpranded, two hours postprandial and three hours postprandial. The reference range for normal blood glucose values at the three postprandial time points corresponds to the following:
The normal blood sugar range for one hour after a meal should be 6.7-9.4 mmol/L, and the maximum should not exceed 11.1 mmol/L.
The normal blood glucose range for two hours after a meal should be less than or equal to 7.8 mmol/L.
Blood glucose should return to normal after three hours after a meal.
When judging whether your blood sugar level is in the normal range, fasting blood sugar is an important reference index, and you can refer to the data listed above to determine whether your fasting blood sugar level is normal.
In addition, in order to maintain good health, in addition to paying attention to a healthy diet, you should also regularly go to the hospital to draw venous blood for laboratory tests, and pay close attention to your blood sugar changes.