HbA1c Explained: What Your Number Really Means
HbA1c is more than just a number—it is a window into the last three months of your blood sugar control. Here is how to read it correctly and what targets matter.
If you have ever been screened for diabetes, you have likely heard of the HbA1c test. Yet many patients still don't fully understand what it measures or what their result truly means for their health.
What is HbA1c?
HbA1c (glycated hemoglobin) measures the percentage of hemoglobin in your red blood cells that has glucose attached to it. Because red blood cells live for roughly three months, HbA1c gives us an average picture of your blood sugar over that period—unlike a fasting glucose test, which only captures a single moment.
Reading Your HbA1c
- Below 5.7% — Normal
- 5.7% to 6.4% — Prediabetes (action needed)
- 6.5% or above — Diabetes
For people already diagnosed with diabetes, the typical target is below 7%. However, this target is highly individual—older patients, those with heart disease, or those at risk of hypoglycemia may need a slightly higher target.
Why HbA1c Matters More Than Daily Readings
Daily glucose readings can swing wildly with meals, stress, and activity. HbA1c smooths out these fluctuations and reflects the true burden of glucose on your body. A high HbA1c is directly linked to increased risk of retinopathy, neuropathy, nephropathy, and cardiovascular disease.
How Often Should You Test?
If your diabetes is well controlled, every six months is usually sufficient. If your treatment regimen has changed or your sugars are not stable, every three months is recommended.
Improving Your HbA1c
Lowering HbA1c by even 1% reduces the risk of microvascular complications by up to 35%. A combination of diet modification, regular physical activity, medication adherence, and stress management can dramatically improve your numbers.
Speak to a diabetologist to set a realistic, personalised HbA1c target and a roadmap to reach it safely.