HbA1c stands for Glycated Haemoglobin.
What does HbA1c mean?
HbA1c stands for glycated haemoglobin, a blood test that shows the average blood sugar level over the past two to three months.
HbA1c stands for glycated haemoglobin. It measures how much glucose has attached to the haemoglobin in your red blood cells. Because red blood cells live for about three months, the HbA1c gives an average picture of blood sugar over the past two to three months, rather than a single moment.
HbA1c is used both to diagnose diabetes and to monitor how well it is controlled. A higher HbA1c means blood sugar has been running high over time. It is often reported as a percentage or in mmol per mol.
Because it reflects long term control rather than one reading, HbA1c is one of the most useful tests in diabetes care and is usually checked every few months.
When is HbA1c used?
Used in endocrinology, general practice, and diabetes care to diagnose diabetes and monitor long term blood sugar control.
Frequently asked questions
What does HbA1c mean?
HbA1c means glycated haemoglobin, a blood test showing average blood sugar over the past two to three months.
What is HbA1c used for?
It is used to diagnose diabetes and to monitor how well blood sugar is controlled.
Why does HbA1c show three months?
Because red blood cells live about three months, so the test reflects average glucose over that period.
What is a normal HbA1c?
Targets vary by person and guideline, so results should be interpreted with a healthcare provider.
How often is HbA1c checked?
For people with diabetes it is usually checked every few months.