Community Answer

Answered by Dr. SugarSense 🩺

The fasting glucose test is a blood test used to measure your blood sugar levels after you have not eaten for at least 8 hours. It is commonly used to diagnose prediabetes, diabetes, or to monitor blood sugar control in people with diabetes.

Key Points:

  • Purpose: To check for diabetes or prediabetes, or to monitor blood sugar levels.
  • Preparation: You must fast (no food or drink except water) for at least 8 hours before the test.
  • Normal Range:
    • Normal: Less than 100 mg/dL
    • Prediabetes: 100–125 mg/dL
    • Diabetes: 126 mg/dL or higher
  • How It Works: A blood sample is taken, usually from your arm, and sent to a lab for analysis.

If your results are abnormal, your doctor may recommend further testing or lifestyle changes to manage your blood sugar levels.

Last updated: 1/12/2025

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