eGFR (Estimated Glomerular Filtration Rate)
eGFR estimates how well your kidneys filter blood. Declining eGFR is the earliest sign of chronic kidney disease, often before any symptoms appear.
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What eGFR (Estimated Glomerular Filtration Rate) measures
eGFR is calculated from your creatinine, age, and sex. It estimates the milliliters of blood your kidneys filter per minute (per 1.73 m² of body surface). Higher is better. An eGFR below 60 for at least 3 months defines chronic kidney disease.
Normal ranges
Reference ranges may vary slightly by lab. Always use the range provided on your specific test report.
What affects your egfr (estimated glomerular filtration rate) level
- Type 2 diabetes (the leading cause of CKD)
- High blood pressure
- Aging (eGFR naturally declines with age)
- Chronic NSAID use
- Dehydration (can cause transient dips)
- Family history of kidney disease
- Repeated kidney infections or autoimmune disease
Foods that may help
Water (consistent intake)
The cornerstone of kidney health
Berries and apples
Low-potassium fruits that are kidney-friendly even in mid-stage CKD
Cauliflower and cabbage
Low-potassium vegetables for kidney-friendly diets
Olive oil
Heart-healthy fat that reduces kidney inflammation
Limit processed foods
Phosphorus and sodium additives accelerate kidney decline
When to see your doctor
An eGFR below 60 confirmed on two tests at least 3 months apart confirms chronic kidney disease. Once below 60, the focus shifts to slowing progression — controlling blood pressure and glucose, and avoiding NSAIDs becomes critical. Regular monitoring is essential.
Related biomarkers
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Educational content only · Not medical advice