The hemoglobin A1C test, or glycated hemoglobin test, is a simple blood test that measures the average level of glucose in the blood over the last 3 months. It is not affected by the daily food intake or sugar fluctuations, so it’s a better marker for diabetes. When your average blood sugar levels are consistently high over time, more glucose is attached to hemoglobin, leading to high hemoglobin A1C.
When hemoglobin A1C is high, you need to consider making serious changes to your lifestyle by including exercise and diet.
A hemoglobin A1C is also ordered by your doctor to diagnose diabetes or prediabetes.