A normal glomerular filtration rate (GFR) is generally considered to be 90 or higher, although this can vary based on factors like age, sex, and body size.
Understanding GFR
The glomerular filtration rate (GFR) is a crucial measure of kidney function. It estimates how much blood your kidneys filter each minute. A healthy GFR indicates that your kidneys are effectively removing waste and excess fluid from your blood. Conversely, a low GFR suggests potential kidney problems.
Normal GFR Ranges
While a GFR of 90 or higher is generally considered normal in most healthy adults, the specific range can vary. Several sources provide slightly different ranges, illustrating the importance of individual assessment:
- GFR above 60: Many sources cite a GFR of 60 or higher as being within the normal range. This is especially true for individuals above age 60, where lower GFRs are common. (National Kidney Foundation, NIDDK)
- GFR 90-120: Other sources specify a normal range between 90 and 120 mL/min/1.73 m². This range is typically observed in younger adults. (University of Rochester Medical Center, National Kidney Foundation, UCSF Health)
- Age-related decline: It's crucial to remember that GFR naturally declines with age. A GFR of 60 ml/min/1.73 m² might be considered normal for an older adult, while it would indicate potential problems in a younger person. (Kidney International)
Stages of Kidney Disease Based on GFR
GFR levels are often used to stage chronic kidney disease (CKD):
- Stage 1: GFR 90 or higher
- Stage 2: GFR 60-89
- Stage 3: GFR 30-59
- Stage 4: GFR 15-29
- Stage 5: GFR below 15 (Kidney failure) (National Kidney Foundation, UPMC)
It's important to note that these ranges are guidelines and your doctor will consider your individual health history and other factors when interpreting your GFR results.
