Pre-diabetes is diagnosed by a blood test. If your blood sugar level is between 100 and 125 mg/dL, you have prediabetes. A blood glucose level in this range is considered to be a risk factor for type 2 diabetes.
Until recently, the A1C test was not recommended as a means to diagnose diabetes. But that's changed. For years, physicians and patients have been advised to use the hemoglobin A1C test (also called "HbA1c" or more recently, "A1C") as a tool to monitor diabetes control. As is well-known, the A1C test measures the average blood glucose level …