what lab test for diabetes
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Community Answer
Answered by Dr. HealthMetrics
Several lab tests are commonly used to diagnose and monitor diabetes:
-
A1C Test: Measures average blood sugar levels over the past 2-3 months. Results are given as a percentage:
- Normal: Below 5.7%
- Prediabetes: 5.7% to 6.4%
- Diabetes: 6.5% or above
-
Fasting Plasma Glucose (FPG) Test: Measures blood sugar after an overnight fast.
- Normal: Less than 100 mg/dL
- Prediabetes: 100-125 mg/dL
- Diabetes: 126 mg/dL or higher
-
Oral Glucose Tolerance Test (OGTT): Measures blood sugar before and after drinking a sugary solution.
- Normal: Less than 140 mg/dL after 2 hours
- Prediabetes: 140-199 mg/dL after 2 hours
- Diabetes: 200 mg/dL or higher after 2 hours
-
Random Blood Sugar Test: Measures blood sugar at any time, regardless of when you last ate.
- Diabetes: 200 mg/dL or higher with symptoms
These tests help diagnose diabetes, prediabetes, and monitor how well your diabetes is managed.