what blood test to check for diabetes
Asked by: JohnDoe
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Community Answer
Answered by Dr. Emily Carter, MD
To check for diabetes, healthcare providers typically use one or more of the following blood tests:
-
A1C Test: Measures your 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 to 125 mg/dL
- Diabetes: 126 mg/dL or higher
-
Oral Glucose Tolerance Test (OGTT): Measures blood sugar before and after drinking a sugary liquid.
- 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 like increased thirst, urination, or fatigue)
Your doctor may recommend one or more of these tests based on your symptoms, risk factors, and medical history.