Biomarker education
eGFR: What It Measures & Why People Track It
Also called: Estimated glomerular filtration rate
eGFR is an estimate of kidney filtration rate derived from creatinine (and sometimes other inputs) using a laboratory equation.
General biomarker education — not personalized medical advice. Learn more
Result on your report
IllustrativeeGFR
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Range: Low – High
What it generally measures
Rather than a direct measurement of filtration, eGFR estimates function using formulas that incorporate creatinine and demographic inputs defined by the lab’s method.
Common units on reports: mL/min/1.73 m²
Why people track it over time
People often watch eGFR across years of metabolic panels. Equations and reporting standards can differ between labs — compare carefully.
Changes over time do not by themselves establish a diagnosis. Learn more
Questions you might ask a healthcare professional
Questions to bring
IllustrativeRelated markers
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Reference range
eGFR reference range
What the range on your report means for this marker.
Panel guide
Related panel guide
Understand the broader panel this marker appears on.
Related biomarker
Creatinine
Creatinine is a waste product measured in blood and often used when assessing kidney-related lab context.