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 ...

The A1C test measures a person’s average blood glucose or blood sugar levels over the past 3 months. An A1C reading of over 5.6% may be a cause for concern, but this will depend on various factors.

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.

22% of US adults reported not knowing their current A1c value when they participated in a recent National Health and Nutrition Examination Survey (NHANES) assessment. They had been diagnosed with ...

Certain health conditions, particularly those affecting red blood cells like iron deficiency anemia and sickle cell disease, can lead to falsely high A1C results. Medications, including steroids and ...