Hemoglobin A1c Testing
- Shows the average level of blood sugar over the past 2 to 3 months. People with diabetes need to have this test done regularly to see whether their blood sugar levels have been staying within a target range.
- This test is also used to diagnose diabetes.
- A1c test results show your average blood sugar level over time.
- The result of your A1c test can also be used to estimate your average blood sugar level. This is called your estimated average glucose, or eAG.