what is a fasting blood glucose
Asked by: HealthCurious
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Community Answer
Answered by Dr. SugarSense 🩺
Fasting blood glucose (FBG) is a test that measures 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:
- Normal Range: 70–99 mg/dL
- Prediabetes Range: 100–125 mg/dL
- Diabetes Range: 126 mg/dL or higher on two separate tests
Why is it important?
- Diagnosis: Helps identify prediabetes or diabetes.
- Monitoring: Tracks how well your diabetes management plan is working.
- Risk Assessment: High fasting glucose levels can indicate an increased risk for diabetes-related complications.
How is it done?
- You will need to fast overnight (8–12 hours).
- A blood sample is taken, usually from a vein in your arm.
- Results are typically available quickly.
If your fasting blood glucose levels are consistently high, consult your healthcare provider for further evaluation and management.