🧪 eGFR (Estimated Glomerular Filtration Rate) Explained

🔍 What Is eGFR?

eGFR stands for estimated glomerular filtration rate.

It’s a calculated number that estimates how well your kidneys are filtering waste from your blood.
Doctors usually calculate eGFR using:

It is not a direct measurement, but an estimate.

eGFR estimates how much blood your kidneys filter each minute.

Higher numbers generally mean better kidney filtering.
Lower numbers suggest reduced filtering, but context matters.

eGFR is almost always interpreted together with creatinine.

eGFR results are often grouped as:

Your lab report will show your exact number and reference ranges.

Lower eGFR values may be caused by:

A single low eGFR does not automatically mean kidney disease.

High eGFR values are generally not concerning.

They may be seen in:

High numbers usually do not require follow-up.

eGFR can change due to:

Values often improve once illness or dehydration resolves.

Doctors may repeat eGFR if:

Kidney disease is usually diagnosed over time, not from one test.

Many people see a temporary dip in eGFR during illness or dehydration.

Doctors focus on trends over months, not one isolated number.

eGFR is an estimate of kidney filtering ability.

Lower numbers can be temporary and explainable, especially when you feel well.

You may want to read:

You can also use the navigation bar above to explore other blood test results.

This information is for educational purposes only and is not medical advice. Always talk with a healthcare professional about your results.

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