what blood test is for diabetes
Asked by: JohnDoe
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Community Answer
Answered by Dr. Emily Smith, MD
The primary blood tests used to diagnose and monitor diabetes include:
-
A1C Test: Measures your average blood sugar levels over the past 2-3 months. It is also known as the hemoglobin A1C or HbA1c test.
- 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 to 125 mg/dL
- Diabetes: 126 mg/dL or higher
-
Oral Glucose Tolerance Test (OGTT): Measures blood sugar before and after drinking a sugary drink.
- Normal: Less than 140 mg/dL
- Prediabetes: 140 to 199 mg/dL
- Diabetes: 200 mg/dL or higher
-
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 being managed.