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Diabetes4 min read

What is HbA1c and how does it measure average blood sugar?

Published: 2026-08-07

Key Takeaways

  • Reflects 90-day average glycemic control.
  • Does not require morning fasting.
  • Gold standard for diagnosing and monitoring diabetes.

HbA1c (Glycated Hemoglobin) reflects average blood glucose over 90 days. Levels below 5.7% are normal, 5.7%–6.4% indicate prediabetes, and 6.5%+ indicate diabetes.


Glycated Hemoglobin (HbA1c) measures glucose molecules bound to hemoglobin inside red blood cells over their 120-day lifespan.

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Medical Disclaimer

This article is intended strictly for educational purposes and should not be used as a substitute for professional medical diagnosis or clinical treatment.

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