A1C is a test that measures a person’s average blood sugar level over the past 60 to 90 days.
Hemoglobin (HEE-mo-glo-bin) is the part of a red blood cell that carries oxygen to the cells and sometimes joins with the glucose in the bloodstream.
Also called hemoglobin A1C or glycosylated (gly-KOH-sih-lay-ted) hemoglobin, the test shows the amount of glucose that sticks to the red blood cell, which is proportional to the amount of glucose in the blood.
The test is used to determine a pre-diabetes or diabetes diagnosis.
If you know your average glucose, you can use my A1C calculator to get an estimate of your A1C.