The hemoglobin A1C test, or simply A1C test, is a common laboratory investigation done to determine if you are diabetic or not. It is also an important test people with diabetes undergo to monitor how well they’re managing the condition.
The A1C test measures your average blood sugar level in the last three months, giving a more accurate impression of how your body regulates sugar. More specifically, the A1C test – also known as glycated hemoglobin or glycosylated hemoglobin – measures the proportion of hemoglobin – the blood’s oxygen-carrying molecule – that is coated with sugar. The higher this percentage, the poorer your body’s control of blood sugar.