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 ...

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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.

A1C measures how well your body is controlling your blood sugar over the past few months. An A1C of 6.5% or higher on two ...