A1C: What It Is, Test, Levels & Chart - Cleveland Clinic
An A1C test measures the average amount of sugar in your blood over the past three months. Providers use it to diagnose diabetes and monitor diabetes management.
A1C Test for Diabetes and Prediabetes | Diabetes | CDC
May 15, 2024 · The A1C test—also known as the hemoglobin A1C or HbA1c test—is a simple blood test. Your A1C is used to diagnose prediabetes and diabetes, and monitor your progress.
Understanding A1C Test | ADA - American Diabetes Association
What Is the A1C Test? The A1C test can be used to diagnose diabetes or help you know how your treatment plan is working by giving you a picture of your average blood glucose (blood sugar) over …
A1C test - Mayo Clinic
Feb 22, 2025 · For people living with diabetes, the test checks how well they manage blood sugar levels. The A1C test also is called the glycated hemoglobin, glycosylated hemoglobin, hemoglobin A1C or …
The A1C Test & Diabetes - NIDDK
Learn what the A1C test is, how it works and is used to diagnose and monitor type 2 diabetes and prediabetes, when it doesn’t work, and how A1C relates to eAG.
The best test to measure your diabetes risk - Harvard Health
Jan 1, 2026 · The bound product is called hemoglobin HbA1c or simply A1c. Although everyone has some amount of glucose that attaches to hemoglobin, you’ll have increasingly higher HbA1c levels if …
A1C: What It Is and What Normal Levels Are - Health
Oct 1, 2025 · The A1C test measures blood sugar levels over the past two to three months. Normal A1C levels are lower than 5.7%, while 6.5% or above indicates type 2 diabetes.
A1C levels: Dangerous vs normal and how to lower It? - Drugs.com
Apr 29, 2025 · This guide explains what A1C is, what counts as a normal or dangerous A1C level, and how you can lower your A1C through healthy lifestyle changes and, if needed, with medications …
What Is A1c? - Kaiser Permanente
Jul 7, 2025 · An A1c test is a blood test that checks your average blood sugar level over the past 2 to 3 months. This test also is called a glycohemoglobin test or a hemoglobin A1c test. The A1c test is one …
A1C chart: Test, levels, and more for diabetes - Medical News Today
Mar 27, 2025 · The A1C test shows average blood sugar levels over the past 2 to 3 months. It can help doctors diagnose diabetes and check how well treatment is working.