Biomarker lab tests typically take a biological sample, like blood, to evaluate certain biomarkers, which are measurable indicators of your health. Whether you're checking your hormones, thyroid, or ...

HbA1c remains a valuable test, but it is only one piece of the puzzle. When symptoms and test results do not agree, further evaluation is often necessary.

Your doctor says everything looks fine, but you still feel terrible. The problem might not be your health but how labs define “normal.” Understanding the difference between normal and optimal could ...