What is the A1C test?
Asked by: JohnDoe
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Community Answer
Answered by Dr. Emily Smith, MD
The A1C test, also known as the hemoglobin A1C or HbA1c test, is a blood test that measures your average blood sugar levels over the past 2 to 3 months. It is commonly used to:
- Diagnose prediabetes and diabetes
- Monitor blood sugar control in people with diabetes
How It Works
- The test measures the percentage of your red blood cells that have sugar-coated hemoglobin.
- Red blood cells regenerate every 3 months, so the A1C test reflects your average blood sugar over that period.
A1C Ranges
- Normal: Below 5.7%
- Prediabetes: 5.7% to 6.4%
- Diabetes: 6.5% or above
For most people with diabetes, the goal is to maintain an A1C level below 7%. However, your doctor may set a different target based on your health condition.