Educational information only. At Precursor, blood testing is requested and reviewed by a clinician and considered alongside your history and other markers, not as a stand-alone diagnosis. Testing is performed in NATA-accredited laboratories to ISO 15189 standards.
What is HbA1c?
HbA1c, or glycated haemoglobin, measures the proportion of your haemoglobin that has glucose attached to it. Because red blood cells live for around three months, HbA1c reflects your average blood sugar over roughly the preceding eight to twelve weeks, rather than a single moment. It is the closest thing to a running average of your glucose control.
Why it matters
Unlike a fasting glucose, which can be swayed by a single day, HbA1c smooths out the day-to-day noise and gives a stable view of longer-term blood-sugar regulation. It needs no fasting, which makes it convenient, and it is one of the core markers a clinician uses when assessing metabolic health.
What your results can mean
If your result is higher
A rising HbA1c suggests average blood sugar has been trending upward, often an early sign of insulin resistance. Because it reflects months rather than moments, it is a useful marker to track as lifestyle changes take effect.
If your result is within the reference range
An HbA1c in the healthy range indicates good average blood-sugar control over recent months, a reassuring sign of metabolic health.
Australian reporting and interpretation
HbA1c is reported in millimoles per mole (mmol/mol) and often as a percentage. In Australia, 6.5% (48 mmol/mol) or above is a diagnostic threshold for diabetes. It is not appropriate to label every value below a US-style 5.7% cut-off as a universal healthy range. In an asymptomatic person, an abnormal result needs confirmation, and some conditions can make HbA1c less reliable.
Test your HbA1c with Precursor
HbA1c is most informative alongside fasting glucose and insulin. At Precursor it is measured as part of Full Advanced Bloods, a single clinician-reviewed blood draw covering your metabolic, heart, hormonal, kidney, liver, thyroid and nutrient markers together, giving you and your clinician a clear view of your longer-term blood-sugar control and a baseline to track.
