Article · 4 min read
What Is GFR and Why It Matters for Your Kidneys
A plain explanation of glomerular filtration rate and what your number reveals about kidney health.
Glomerular filtration rate (GFR) is the best single measure of how well your kidneys filter blood. It estimates how much blood the kidneys clean every minute.
How it is measured
GFR is usually estimated (eGFR) from a blood creatinine test plus your age and sex — no separate procedure needed.
What the number means
A normal GFR is roughly 90 or above. Below 60 for three months or more usually signals chronic kidney disease.
Frequently Asked Questions
What GFR means kidney failure?
Below 15 indicates kidney failure, when dialysis or transplant is usually considered.
Sources
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This page is for general education only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified doctor about your specific condition.