what is hba1c blood test
Asked by: CuriousPatient123
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Community Answer
Answered by Dr. Emily 🩺
The HbA1c blood test, also known as the A1C test or glycated hemoglobin test, is a common blood test used to measure your average blood sugar (glucose) levels over the past 2 to 3 months. It is a key tool for diagnosing and managing diabetes and prediabetes.
How It Works:
- Glucose in your bloodstream attaches to hemoglobin, a protein in red blood cells.
- The A1C test measures the percentage of hemoglobin that is coated with glucose.
- Since red blood cells regenerate every 3 months, the test reflects your average blood sugar levels over that period.
A1C Results:
- Normal: Below 5.7%
- Prediabetes: 5.7% to 6.4%
- Diabetes: 6.5% or higher
Why It’s Important:
- It helps diagnose diabetes and prediabetes.
- It monitors how well your diabetes treatment plan is working.
- It provides a long-term view of blood sugar control, unlike daily glucose checks.
Preparation:
- No fasting is required for the A1C test.
- It can be done at a doctor’s office or lab with a simple blood draw.
For more details, visit CDC's A1C Test Guide.