what is a normal gfr

The normal glomerular filtration rate (GFR) is an important indicator of kidney function. GFR is a measure of how well the kidneys are filtering blood, and it is typically expressed in milliliters per minute per 1.73 square meters. In adults, the normal GFR number is usually more than 90. GFR declines with age, even in people without kidney disease, so the normal range for GFR depends on age, weight, and muscle mass. For example, a GFR above 60 is considered normal, while a GFR below 60 may indicate kidney disease. A GFR of 15 or below may mean kidney failure and requires immediate medical attention. Its important to note that GFR levels may vary slightly among different laboratories, and its essential to consult a healthcare provider to interpret specific test results. Regular monitoring of GFR is crucial for identifying kidney disease in its earliest stages, when it is most treatable.