Quality CareFind out why Mayo Clinic is the right place for your health care. Make an appointment.
Meet the StaffFind a directory of doctors and departments at all Mayo Clinic campuses. Visit now.
Research and Clinical TrialsSee how Mayo Clinic research and clinical trials advance the science of medicine and improve patient care. Explore now.
Visit Our SchoolsEducators at Mayo Clinic train tomorrow’s leaders to deliver compassionate, high-value, safe patient care. Choose a degree.
Professional ServicesExplore Mayo Clinic’s many resources and see jobs available for medical professionals. Get updates.
Give to Mayo ClinicHelp set a new world standard in care for people everywhere. Give now.
Mayo Clinic offers appointments in Arizona, Florida and Minnesota and at Mayo Clinic Health System locations.
Subscribe to Housecall
Our general interest e-newsletter keeps you up to date on a wide variety of health topics.
Our office recently received a call asking about a "new" blood test to diagnose diabetes. You may have heard on the news earlier this year that at the American Diabetes Association's annual meeting an international committee of experts announced their consensus that the A1C blood test is an accurate way to diagnose diabetes.
The A1C test, also known as glycated hemoglobin or HbA1C, is a blood test that provides a picture of average blood sugar control for the past two to three months. When you have uncontrolled diabetes, you have too much sugar in your blood stream. The extra blood glucose enters your red blood cells and sticks to the molecules of the hemoglobin.
The A1C measures the percentage of glycosylated hemoglobin in your blood and this gives your doctor an overview of your average blood glucose control over the past 2-3 months. So, the A1C test is not new, it is just that it's now being recommended as a tool to diagnose diabetes.
The A1C helps:
The A1C does not:
Daily self-testing of blood glucose and your log results are important to staying in effective control. The A1C test is used along with your daily blood glucose checks for the best possible control.
Sara J. Carlson, R.N., C.D.E.
Peggy Moreland, R.N., C.D.E.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Check out these best-sellers and special offers on books and newsletters from Mayo Clinic.
A single copy of these materials may be reprinted for noncommercial personal use only. "Mayo," "Mayo Clinic," "MayoClinic.org," "Mayo Clinic Healthy Living," and the triple-shield Mayo Clinic logo are trademarks of Mayo Foundation for Medical Education and Research.
We comply with the HONcode standard for trustworthy health information: verify here.