Are your creatinine levels normal? How to tell and what to do if they're high

Creatinine levels indicate a person's kidney health, and high levels mean your kidneys are not working as effectively as they should.
Oregonian

Dear Doctor: How does blood test eGFR number reflect kidney function, and what range is ‘normal’?

DEAR DR. ROACH: I am a 73-year-old female. A recent blood test returned an eGFR (estimated glomerular filtration rate) of 59. My physician’s nurse told me that the test was normal. When I asked her ...