what is ac1 test for diabetes

The A1C test, also known as the hemoglobin A1C or HbA1c test, is a blood test used to diagnose and monitor diabetes and prediabetes. It measures your average blood sugar levels over the past 2-3 months by assessing the percentage of hemoglobin in your red blood cells that is coated with sugar (glycated hemoglobin).

Key Points:

• Diagnosis: The A1C test is used to diagnose prediabetes and diabetes.
  • Normal: Below 5.7%
  • Prediabetes: 5.7% to 6.4%
  • Diabetes: 6.5% or above
• Monitoring: For people with diabetes, the A1C test helps track how well blood sugar levels are managed over time.
• Frequency: Most people with diabetes should have the A1C test at least twice a year.

How It Works:

• Glucose in the bloodstream attaches to hemoglobin in red blood cells.
• The A1C test measures the percentage of hemoglobin that is glycated.
• Since red blood cells regenerate every 3 months, the test reflects average blood sugar levels over that period.

Why It’s 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 to prevent complications.

For more details, visit the CDC's A1C Test page.