The normal GFR can change with ageing (as you get older it can decrease). GFR should be 90 or higher on a normal scale.
When the GFR falls below 60, the kidneys are not functioning properly. Once the GFR falls below 15, one is at a greater risk of needing dialysis or a kidney transplant as treatment for renal failure.
What does the term "renal function" mean?
REE-nul FUNK-shun a phrase used to indicate the kidneys' efficiency. The kidneys help maintain the body's chemical balance by excreting waste and surplus water from the blood as urine and by removing waste and excess sodium, potassium, and calcium.
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