HbA1c is a test that measures the amount of glycosylated hemoglobin in your blood. Glycosylated hemoglobin is a molecule in red blood cells that attaches to glucose (blood sugar). You have more glycosylated hemoglobin if you have more glucose in your blood.
The test gives a good estimate of how well diabetes is being managed over the last 2 or 3 months.
Glycosylated hemoglobin; Hemoglobin - glycosylated; A1C; GHb; Glycohemoglobin; Diabetic control index