Medically reviewed by Allison Herries, RDN An A1C test is used to diagnose and monitor diabetes by measuring the body's average blood sugar level over the past three months. A high hemoglobin A1C, or ...
1 This committee suggested that glycated hemoglobin be adopted as the test to define diabetes and other states of hyperglycemia. Results from a new study by Selvin and colleagues 2 support earlier ...