Time Frame

• The A1C test measures a person's blood sugar level over a 120-day period.
  
  

Function

• The A1C test determines what percentage of hemoglobin, a protein in red blood cells, is coated with sugar. A higher A1C number indicates poorer blood glucose control.
  
  

Testing Schedule

• According to the American Diabetes Association, every diabetic should have an A1C test performed a minimum of twice a year, with more frequent testing for those with poor control or changes in treatment.
  
  

Considerations

• Fasting is not required for the A1C test.
  
  

Results

• According to the Mayo Clinic, a normal A1C for non-diabetics is between 4.5 and 6 percent. A result of 6.5 or higher on more than two occasions indicates a diabetic diagnosis.