Is 108 A High Fasting Glucose Level?



Asked by Carol

Is 108 A High Fasting Glucose Level?

I haven't been diagnosed with diabetes, but I have had lots of blood work over the years and my fasting glucose is always between 100-108. I thought anything under 110 was fine, but I just wanted to make sure?


The ADA says that a fasting blood glucose level should be under 126.

The fasting plasma glucose (FPG) test has been the standard test for diabetes. It is a simple blood test taken after 8 hours of fasting. FPG levels indicate:

  • Normal: 100 mg/dL (or 5.5 mmol/L) or below
  • Pre-Diabetes: Between 100 - 125 mg/dL (5.5 - 7.0 mmol/L)
  • Diabetes: 126 mg/dL (7.0 mmol/L) or higher

The FPG test is not always reliable, so a repeat test is recommended if the initial test suggests the presence of diabetes, or if the test is normal in people who have symptoms or risk factors for diabetes.