Introduction
If you are of African, Mediterranean, or Southeast Asian heritage, you could have a form of hemoglobin* in your red blood cells that affects your diabetes care. Hemoglobin in red blood cells gives blood its red color and carries oxygen from your lungs to all parts of your body. Some forms of hemoglobin can cause false results for a diabetes blood test called the A1C test. If the A1C test gives a false result, your health care provider may think your blood glucose, also called blood sugar, level is higher or lower than it really is.
diabetes.niddk.nih.gov/dm/pubs/traitA1C/index.aspx