The relationship between pre diabetes and A1C, also known as glycated hemoglobin, has been shown to be an indicator and useful tool in the diagnosis of pre diabetics. Doctors normally administer one or more tests, such as a simple routine blood test, fasting plasma glucose test (FPG), or A1C test, to individuals displaying symptoms of pre diabetes. While all will measure blood glucose levels there is evidence suggesting that the A1C test is the most reliable and accurate.  

The FPG test measures the level of blood glucose after fasting for a minimum of eight hours. The difficulty of the FPG test is that a second test is often necessary and the need for retesting increases if the patient has not fasted properly. For this reason the A1C test is considered superior. The A1C checks the blood glucose levels of individuals from the previous two to three months, measuring glycated …