Community Answer

Answered by Dr. Emily Carter, MD 🩺

Fasting blood sugar (or fasting blood glucose) is a measure of your blood sugar levels after not eating or drinking anything (except water) for at least 8 hours. It is commonly used to diagnose diabetes or prediabetes. Here are the typical ranges:

  • Normal: Less than 100 mg/dL
  • Prediabetes: 100 to 125 mg/dL
  • Diabetes: 126 mg/dL or higher on two separate tests

Fasting blood sugar is an important indicator of how well your body manages glucose, especially for individuals with diabetes. If your fasting blood sugar is consistently high, it may indicate poor glucose control and could increase the risk of complications.

Last updated: 1/12/2025

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