The Hemoglobin A1c (HbA1c) Test for Diabetes

The hemoglobin A1c test—also called HbA1c, glycated hemoglobin test, or glycohemoglobin—is an important blood test used to determine how well your diabetes is being controlled. 

Hemoglobin A1c provides an average of your blood sugar control over a 6 to12 week period and is used in conjunction with home blood sugar monitoring to make adjustments in your diabetes medicines.

Hemoglobin is a substance within red blood cells that carries oxygen through your body.  When your diabetes is not controlled (meaning that your blood sugar is too high), sugar builds up in your blood and combines with your hemoglobin, becoming "glycated." 

Therefore, the average amount of sugar in your blood can be determined by measuring a hemoglobin A1c level. 

If your glucose levels have been high over recent weeks, your hemoglobin A1c test will be higher.  The amount of hemoglobin A1c will reflect the last several weeks of blood sugar levels, typically encompassing a period of 120 days.

For more information, call St. Peter's Wellness Center at (406) 444-2128.


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