Hemoglobin A1c (HbA1c)
Hemoglobin A1c (HbA1c) is a blood test that measures the average blood sugar (glucose) levels over the past two to three months. It provides an indication of long-term blood sugar control, particularly in people with diabetes. HbA1c is formed when glucose in the bloodstream attaches to hemoglobin, the protein in red blood cells that carries oxygen.
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