Understanding Lab Tests for Prediabetes
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Prediabetes is a condition where blood glucose levels are higher than normal but not yet high enough to be classified as type 2 diabetes. This condition affects millions of people and often has no symptoms, making blood testing essential for early detection and prevention of progression to diabetes.
Top Recommended Test
Hemoglobin (Hgb) A1c
This test measures average blood glucose levels over the past 2-3 months. Hemoglobin A1C levels that are higher than normal but not high enough to be classified as diabetes can indicate prediabetes, a condition that can progress to type 2 diabetes if not managed properly.
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Why Blood Testing is Critical for Prediabetes
Since prediabetes typically presents without noticeable symptoms, blood tests are the primary method for diagnosis. Early detection through testing allows for lifestyle interventions and monitoring that can prevent or delay the development of type 2 diabetes and its associated complications.
Other Relevant Tests
Hemoglobin (Hgb) A1c With eAG Estimation
This comprehensive test measures Hemoglobin A1C and provides an estimated Average Glucose (eAG) value in both mg/dL and mmol/L. Elevated A1C and eAG levels that fall within the prediabetic range indicate consistently higher than normal blood glucose levels, serving as early indicators of this condition before it progresses to diabetes.
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Understanding Your Results
Prediabetes is typically diagnosed when Hemoglobin A1C levels fall between 5.7% and 6.4%. Results in this range indicate that blood sugar levels have been consistently elevated over the past few months, signaling the need for lifestyle changes and regular monitoring to prevent progression to type 2 diabetes.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment recommendations.
