The A1c test is a blood test that measures your average blood glucose (blood sugar) over a three-month period. It helps ...
Medically reviewed by Suzanne Fisher, RD As you age, your risk for higher blood sugar increases—which raises the risk of type ...
C. Ronald Kahn, M.D. President and Director, Joslin Diabetes Center What is the A1c blood test? The hemoglobin A1C test is a measure of what we call long term glucose control. The way this works ...