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What is an A1C test?

An A1C test, also known as HbA1c or glycated hemoglobin test, measures your average blood glucose levels over the past 2 to 3 months. Hemoglobin is the protein in red blood cells that carries oxygen. When glucose enters your bloodstream, it can attach to hemoglobin, becoming 'glycated'. The A1C test measures the percentage of glycated hemoglobin, providing a long-term view of blood glucose control. For people with diabetes, the A1C test is a critical tool that helps healthcare providers assess how well diabetes management plans are working. An A1C level below 7% is usually a common target for people with diabetes, but the target may vary depending on the individual. Regular monitoring of A1C can lead to necessary adjustments in diet, exercise, or medications to better manage diabetes.


  1. Mayo Clinic. (2020). "A1C test."

  2. National Institute of Diabetes and Digestive and Kidney Diseases. (2020). "The A1C Test & Diabetes."

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