The kidney is an important organ in the body that is directly related to the function of filtering blood and excreting substances. The glomerular filtration rate (GFR) is shown through the clearance index of creatinine and other substances in the body.

Kidney disease often develops silently, and by the time it is detected, the condition is already critical. The best way to assess kidney function and detect kidney disease early is to perform an estimated glomerular filtration rate (eGFR) test.

The kidneys are organs that help the body perform two tasks: excretion and endocrine. There are many different tests to calculate the kidney's ability to function. Of these, measuring the eGFR is the best test to examine the glomerular blood filtration function.