science
Lab Test
Diabetes Blood Tests: What Your Results Mean
Diabetes screening tests measure blood sugar levels to detect prediabetes and diabetes. Early detection is critical — diabetes can be managed effectively, and prediabetes can often be reversed with lifestyle changes before it progresses to full diabetes.
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What It Tests
Fasting blood glucose, HbA1c (glycated hemoglobin), random blood glucose, and oral glucose tolerance test (OGTT).
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Why It's Ordered
Diabetes screening is recommended for overweight adults over 35, those with high blood pressure, family history of diabetes, history of gestational diabetes, or symptoms of high blood sugar.
Markers in This Test
Frequently Asked Questions
What blood sugar level indicates diabetes? expand_more
Fasting glucose at or above 126 mg/dL on two separate occasions, HbA1c at or above 6.5%, or random glucose at or above 200 mg/dL with symptoms.
Can prediabetes be reversed? expand_more
Yes — studies show that losing 5–7% of body weight and exercising 150 minutes per week can reduce the risk of progressing from prediabetes to diabetes by 58%.
What is the best test for diabetes diagnosis? expand_more
HbA1c is preferred because it does not require fasting and reflects 3 months of blood sugar control. Fasting glucose is also commonly used and is more affected by short-term changes.
How accurate are home glucose meters? expand_more
Home glucose meters are 85–99% accurate compared to lab tests. They are excellent for monitoring trends but lab tests are more accurate for initial diagnosis.
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