Community Answer

Answered by Dr. SugarSense 🩺

Fasting blood sugar (FBS) refers to the level of glucose in your blood 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.

Normal Ranges for Fasting Blood Sugar:

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

Why is it important?

  • Diagnosis: Helps identify diabetes or prediabetes.
  • Monitoring: Tracks how well diabetes is being managed.
  • Risk Assessment: High fasting blood sugar levels can indicate an increased risk of complications like heart disease.

How is it tested?

  • A blood sample is taken after an overnight fast (usually 8-12 hours).
  • It is often part of routine health checkups or diabetes management plans.

If your fasting blood sugar is high, consult your healthcare provider for further evaluation and management.

Last updated: 1/12/2025

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