Hemoglobin A1c (A1C) estimates your average blood sugar over about 3 months. It helps guide diabetes goals and treatment changes. A1C has been a cornerstone of diabetes management since the 1990s. The ...

High A1C levels are a risk factor for diabetes and other complications. However, ideal and dangerous A1C levels can vary slightly between each individual. Lifestyle changes can help manage A1C levels.

An A1c test is key if you have diabetes or if your doctor thinks you might have a chance of getting it. It's a common blood test that gives information about your blood sugar. It’s the main way to ...