The normal Glomerular Filtration Rate (GFR) range is generally 90 to 120 mL/min/1.73 m2, but it's crucial to note that GFR decreases with age. This means older individuals will have lower "normal" GFR levels compared to younger adults.
Understanding GFR and Age
GFR measures how well your kidneys filter waste from your blood. It's a key indicator of kidney function. While the general range of 90-120 mL/min/1.73 m2 is often cited, the normal range can vary based on age:
- Younger Adults: Typically fall within or above the 90-120 mL/min/1.73 m2 range.
- Older Adults: Often have GFR values below 90 mL/min/1.73 m2, which may be considered normal for their age.
Factors Affecting GFR
Besides age, other factors that can influence GFR include:
- Overall Health: Conditions like diabetes, high blood pressure, and heart disease can affect kidney function.
- Medications: Certain medications can impact GFR.
- Dehydration: Can temporarily decrease GFR.
Normal Value Ranges Can Vary
It's important to remember that:
- Lab Variations: Normal ranges can vary slightly between different laboratories. This is because labs may use different testing methods or measure different samples.
- Individual Factors: Your doctor will consider your overall health, age, and other factors when interpreting your GFR test results.
Why GFR Declines with Age
As we age, our kidneys naturally become less efficient at filtering blood. This is a normal part of the aging process, although certain medical conditions can accelerate this decline.
Key Takeaways
- General Normal GFR: 90 to 120 mL/min/1.73 m2.
- Age Impact: GFR decreases with age.
- Individual Variability: Normal ranges can vary among different labs.
- Medical Supervision: Always consult a healthcare professional for an accurate GFR interpretation.
