Should A1c Tests Be Used for Screening for Diabetes? No.
Majid Ali, M.D.
Insulin and Glucose Profiles of Reversing Diabetes D3 Series
The blood A1c test is an excellent test for monitoring the results of diabetes treatment, but it is not reliable for screening for diabetes. I have encountered far too many patients whose A1c test was below 5.5% and whose three-hour post-glucose challenge profiles showed full criteria for the diagnosis of diabetes.