eGFR
A calculated estimate of glomerular filtration rate — the gold standard for kidney function.
What is it
Estimated glomerular filtration rate is calculated from creatinine, age, sex, and other factors. It estimates how much blood the kidneys filter per minute.
Why it's measured
eGFR has been used as the standard measure of kidney function in research and clinical practice, including in kidney disease staging.
Reference range
Standard laboratory reference
> 90 mL/min/1.73m²
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Generally considered favorable.
Lower
Has been used to stage chronic kidney disease in published research.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Reported automatically when creatinine is measured.
Related markers
Common questions
Estimated glomerular filtration rate is calculated from creatinine, age, sex, and other factors. It estimates how much blood the kidneys filter per minute.
It's one of the markers used to build a fuller picture of your health. On its own it tells you very little, so it's most informative when reviewed alongside related markers.
It's measured from a standard blood draw at Quest or LabCorp. eGFR (estimated GFR) is one of the markers included in the OPTML Apex Panel, where your results are read across systems and reviewed by a U.S.-licensed physician.
Reference ranges vary by laboratory, and a single value rarely tells the whole story. Review your result with a physician in the context of your other markers, symptoms, and history.
eGFR (estimated GFR) is one signal among many. Answer a few quick questions and we’ll point you to the panel that fits.
eGFR is calculated from creatinine, and creatinine rises with muscle mass. That means a muscular person can show a lower estimated GFR without any change in actual kidney function. Cystatin C is not affected by muscle in the same way and is the usual next step when the two pictures disagree. If you want a structured place to start, the training library lists every programme we publish by days per week and equipment.
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Find the right panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.
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