TESTS & IMAGING
Metabolic tests, and how to read them
What each test measures, when it helps, when it misleads and which numbers actually change decisions.
Written and reviewed by Farhan Tahir, MD
4 GUIDES
Blood sugar
Blood sugar
Hemoglobin A1c
Your average blood sugar over about three months, and the main test for diagnosing and tracking diabetes.
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Blood sugar
Fasting glucose & OGTT
Snapshot and stress tests of blood sugar control. The OGTT catches problems a fasting test can miss.
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Blood sugar
Fasting insulin & HOMA-IR
A research measure of insulin resistance. Useful context, but not a diagnostic test.
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Blood sugar
Continuous glucose monitoring
A wearable sensor that shows glucose patterns day and night. Essential in diabetes, still evolving outside it.
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2 GUIDES
Liver & body composition
Liver & body composition
Liver tests & FIB-4
Simple blood tests and a free calculation that flag fatty liver patients who need a closer look.
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Liver & body composition
DXA body composition & waist
Measures fat, muscle and where fat sits, which matters more than weight alone.
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