how does an a1c work
Asked by: CuriousPatient123
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Community Answer
Answered by Dr. Emily Carter, MD
The A1C test, also known as the hemoglobin A1C or HbA1c test, measures your average blood sugar levels over the past 2 to 3 months. Here's how it works:
- Hemoglobin and Glucose: When sugar enters your bloodstream, it attaches to hemoglobin, a protein in your red blood cells.
- Glycated Hemoglobin: The A1C test measures the percentage of your red blood cells that have sugar-coated hemoglobin.
- Time Frame: Since red blood cells regenerate roughly every 3 months, the A1C test reflects your blood sugar levels over that period.
A1C Ranges
A1C Level Diagnosis
Below 5.7% Normal
5.7% - 6.4% Prediabetes
6.5% or above Diabetes
This test is crucial for diagnosing prediabetes and diabetes, as well as monitoring how well your diabetes is managed over time.