what is hbac blood test

The HbA1c blood test, also known as the hemoglobin A1c test, is a common blood test used to measure your average blood sugar (glucose) levels over the past 2 to 3 months. It is primarily used to:

• Diagnose prediabetes and diabetes:
  • Normal: Below 5.7%
  • Prediabetes: 5.7% to 6.4%
  • Diabetes: 6.5% or higher
• Monitor diabetes management: For people with diabetes, it helps assess how well their blood sugar is being controlled over time.

How does it work?

• Glucose in your blood attaches to hemoglobin, a protein in red blood cells.
• The test measures the percentage of hemoglobin that is coated with sugar (glycated hemoglobin).
• Since red blood cells regenerate every 3 months, the test reflects your average blood sugar levels over that period.

Why is it important?

• It provides a long-term view of blood sugar control, unlike daily glucose tests, which only show a snapshot.
• It helps healthcare providers adjust treatment plans for diabetes management.

For more details, visit CDC's A1C Test Guide.