eGFR Test: A Key Indicator of Kidney Health & Function
The estimated Glomerular Filtration Rate (eGFR) is a crucial measure of kidney function and overall renal health. A low eGFR may indicate chronic kidney disease (CKD), dehydration, or other underlying conditions. This guide explains how eGFR levels are calculated, why they matter, and what steps you can take to optimize kidney function. Learn when to test, how to interpret your GFR lab results, and ways to improve kidney health through lifestyle changes.
- Published
- July 2, 2024
- Read time
- 2 min read
What is eGFR?
Estimated Glomerular Filtration Rate (eGFR) is a calculated measure of kidney function, representing the rate at which the kidneys filter waste and excess fluid from the blood. It’s an estimate of the glomerular filtration rate (GFR), which is the volume of blood filtered per minute by the kidney’s glomeruli, tiny filtering units within the kidneys.
What does it assess?
Estimated Glomerular Filtration Rate (eGFR) is a measure of kidney function, specifically indicating how well the kidneys filter waste from the blood. Regular monitoring of eGFR can help detect early signs of kidney impairment, assess disease progression, and guide treatment decisions. eGFR is a vital marker for assessing kidney health, and optimizing kidney function through lifestyle, diet, and monitoring is essential for maintaining a healthy eGFR.
How do I optimize my eGFR?
Diabetes is another major cause of kidney damage. Proper blood sugar control through a balanced diet and exercise helps protect kidney function and maintain a healthier eGFR. Adequate hydration supports kidney function by helping them filter waste efficiently. Aim for consistent fluid intake throughout the day but avoid excessive water intake, which can strain the kidneys. While protein is important for muscle health, excessive intake, especially from animal sources, can stress the kidneys. Aim for moderate protein intake and limit processed foods to reduce sodium.
What does a good and bad eGFR look like?
High eGFR levels suggest healthy kidney function. However, eGFR above a certain threshold may not be clinically significant. Low eGFR levels often indicate reduced kidney function. A consistently low eGFR calls for medical evaluation to determine the cause of kidney impairment, potential underlying conditions, and appropriate treatment steps to slow progression. For the CKD stage thresholds, the temporary causes of a falsely low result, and when to retest, see low eGFR symptoms and causes.
Related Estimated Glomerular Filtration Rate Creatinine (eGFRcr) Resources
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How to Improve Your Estimated Glomerular Filtration Rate Creatinine (eGFRcr) Level Naturally
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eGFR Gives Insight Into Your Kidney Health. Here’s What It Is and How to Optimise It.
Kidney and urinary health tests
Cystatin C with Estimated Glomerular Filtration Rate (eGFR) Blood Test
A kidney filtration marker that stays accurate when muscle mass throws off creatinine.
Comprehensive Metabolic Panel (CMP)
A 14-marker snapshot of kidney function, liver function, electrolytes, and blood sugar in one draw.
Urinalysis, Complete Test with Reflex to Urine Culture
A broad screen of the urine that flags infection, kidney issues, blood sugar problems, and dehydration in one sample.
