Serum Creatinine Normal Range According To Age: Can Its Level Change Quickly?

Although it is a waste byproduct, creatinine provides a lot of information about the health of your kidneys. Kidney levels vary with age. However, there is not much difference in the normal level of creatinine after a certain age. Nevertheless, you should never rely on a single blood report for creatinine levels as creatinine levels can fluctuate from day to day.