Is fasting blood sugar 5.7 a precursor to diabetes?

Fasting blood glucose 5.7mmol/L is generally not a precursor to diabetes.

Under normal circumstances, the human fasting blood glucose is 3.9-6.1mmol/L. Fasting blood glucose 5.7mmol/L is within the normal range, which is a normal phenomenon and does not mean that there is a disease. Moreover, there is no precursor to diabetes. It is usually found in a blood glucose test during a physical examination, so fasting blood glucose 5.7mmol/L is generally not a precursor to diabetes. There is no need to worry too much.

If you are worried about diabetes, you can also see a doctor for a physical examination, oral glucose tolerance test, urine glucose test, islet beta cell function test, etc. for a clear diagnosis.