Quick highlights
- Calculated kidney filtration estimate derived from serum creatinine
- Commonly used for routine kidney monitoring in diabetes and hypertension
- Interpretation depends on age/sex inputs—ensure accurate details
- Trends over time are more informative than a single value
- Muscle mass and diet can influence creatinine and eGFR
- Often paired with urine albumin (ACR) for kidney risk assessment
- Useful for medication dose adjustments under clinician guidance
- No fasting usually required; simple blood draw
- Home blood collection available in many service areas
- SEO coverage: eGFR test, kidney function test eGFR, estimated GFR report
What’s included
Preparation
- Book blood draw (home or lab)
- No fasting unless combined tests require fasting
- Avoid intense exercise 24 hours before if feasible
- Avoid heavy meat meal right before test where possible
- Provide accurate age and sex details for calculation
- Collect serum blood sample via trained phlebotomist
- Download report from <a href='/my-account/'>View reports</a>
- Review with clinician; consider urine ACR if advised
FAQs
An estimate of kidney filtration calculated from serum creatinine and demographic inputs like age and sex.
Usually no.
No. Creatinine is measured; eGFR is calculated from it to estimate filtration.
Many reasons exist, including kidney disease, dehydration, or temporary illness; clinicians interpret with context.
Yes. Higher or lower muscle mass can affect creatinine and therefore eGFR.
Often yes; urine albumin/ACR helps assess kidney damage risk along with eGFR.
Often same day or within 24 hours.
Serum blood sample.
Yes in many serviceable areas.
Yes; hydration status can influence creatinine and eGFR interpretation.
CKD diagnosis is clinician-led and usually based on persistent findings over time and/or urine markers.
As advised by your clinician based on risk factors.
Download from <a href='/my-account/'>View reports</a>.
Urea/BUN, urine ACR, electrolytes, and blood pressure monitoring.
Notes
eGFR is an estimate and varies with age and muscle mass.
