Hemoglobin A1c (Glycated Hemoglobin) by High-Performance Liquid Chromatography (HPLC)

The HbA1c test is a key tool for understanding your average blood sugar levels over the past two to three months, making it essential for detecting diabetes or prediabetes early and helping your doctor manage your treatment plan effectively over time.

HbA1c is a key tool for managing diabetes because it provides a snapshot of how well your blood sugar has been controlled over time. Unlike daily blood sugar checks, it’s less affected by short-term fluctuations.

The HbA1c test measures the percentage of hemoglobin, a protein in your red blood cells, that has sugar attached to it. Because red blood cells live for about three months, this test reflects your average blood glucose during that entire period rather than a single moment.

Your blood sample is separated into different types of hemoglobin using high-performance liquid chromatography. The machine identifies and measures the glycated hemoglobin fraction, which is then expressed as a percentage.

A small blood sample is required for this test. It can be collected from a vein in your arm at a lab or clinic, or in some cases through a simple fingerstick, and the collection process itself usually takes only a few minutes to complete.

A small blood sample is drawn from your arm, similar to other blood tests. The test uses whole blood, not plasma or serum, for this specific measurement.

You can eat and drink normally before an HbA1c test because fasting is not required. During the blood draw you may feel a quick pinch, and mild soreness or slight bruising at the needle site is possible, but these effects typically go away within a day.

You may feel a slight pinch when the blood is drawn, but it usually takes only a few minutes. No special preparation is needed, though fasting is not required for this test.