A test to identify the average blood glucose level over the last 2-3 months. Also known as glycosylated haemoglobin, this test measures the amount of glucose that attaches to red blood cells which depends on how much glucose is in the bloodstream. If BGLs have been high over the 2-3 month period, more glucose will attach to the red blood cells and HbA1c will be high. If BGLs are mostly within the recommended range, then HbA1c will be closer to the desired level.
