eGFR Levels Chart: Normal GFR Range by Age and Stages
The eGFR (estimated glomerular filtration rate) shows how well your kidneys filter blood. Normal values are typically above 90 mL/min/1.73m², though lower levels may be normal with age. Low eGFR levels suggest reduced kidney function, while unusually high values may occur in early diabetes or pregnancy. This blood test is essential for detecting chronic kidney disease early.
Contents
Result interpretation eGFR
What your result means based on common reference ranges
eGFR levels above 90 indicate normal kidney function with effective filtration and no signs of chronic kidney disease.
Mildly elevated eGFR levels may reflect increased filtration from pregnancy, high protein intake, or early diabetes hyperfiltration.
Significantly high eGFR levels can occur in early diabetic nephropathy due to persistent hyperfiltration stress on glomeruli.
Low eGFR levels below 60 suggest impaired kidney function and possible chronic kidney disease progression or renal damage.
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What is eGFR?
The eGFR blood test estimates kidney filtration efficiency based on creatinine, age, and sex. It reflects how effectively the glomeruli remove waste products such as urea and toxins from circulation. Unlike creatinine alone, eGFR provides a more accurate assessment of kidney function level. Clinically, it is used to classify chronic kidney disease stages and monitor progression. Reduced eGFR levels are commonly associated with diabetes, hypertension, and kidney damage, while temporary fluctuations may occur due to hydration or medication effects.
Reference ranges
Causes of abnormal values
Causes of low eGFR
- • Chronic hypertension — damages glomerular vessels reducing filtration efficiency
- • Diabetes mellitus — long-term hyperglycemia causes kidney scarring
- • Dehydration — reduces renal blood flow and temporarily lowers eGFR
- • Glomerulonephritis — inflammation directly impairs filtration structures
Causes of high eGFR
- • Early diabetes — hyperfiltration increases kidney workload and raises eGFR temporarily
- • Pregnancy — increased blood flow elevates filtration rate
- • High protein diet — nitrogen load increases glomerular filtration demand
- • High muscle mass — altered creatinine dynamics affect eGFR calculation
- • Certain medications — affect creatinine secretion and distort estimated values
eGFR in combination with other markers
Possible symptoms
- •Fatigue due to toxin accumulation
- •Edema in legs, ankles, or face
- •Foamy urine from protein loss
- •Itchy skin from metabolic waste buildup
- •Increased nighttime urination
When to see a doctor
Consult a doctor if eGFR levels are consistently below 60 for more than three months. Seek medical attention if low eGFR is accompanied by swelling, reduced urine output, or worsening fatigue.
What to do if abnormal
- Maintain proper hydration to support kidney blood flow
- Control blood pressure below 130/80 to protect kidney vessels
- Manage blood sugar to prevent diabetic kidney damage
- Review medications and avoid long-term NSAID use
- Follow a balanced diet with controlled protein intake
The information on this page is intended for general understanding of test results and does not replace medical consultation. Accurate interpretation requires considering other blood markers and individual factors.
Content is based on medical literature and used within the PulseBook analytical system.
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