Community Answer

Answered by Dr. Emily 🩺

The Hemoglobin A1C (HbA1c) test is a blood test that measures your average blood sugar (glucose) levels over the past 2 to 3 months. It is commonly used to diagnose prediabetes and diabetes, as well as to monitor how well you are managing your diabetes over time.

How Does It Work?

  • Glucose in your blood attaches to hemoglobin, a protein in red blood cells.
  • The A1C test measures the percentage of your red blood cells that have glucose-coated hemoglobin.
  • Since red blood cells regenerate every 3 months, the test reflects your average blood sugar levels over that period.

A1C Results and What They Mean:

A1C Level Diagnosis

Below 5.7% Normal
5.7%–6.4% Prediabetes
6.5% or higher Diabetes

Why Is It Important?

  • It provides a long-term view of blood sugar control.
  • It helps healthcare providers adjust treatment plans for diabetes management.

For more details, consult your healthcare provider or visit trusted sources like the CDC.

Last updated: 1/12/2025

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