Kidneys are truly impressive. The more you learn, the more you'll understand why you want to keep them healthy.

Learn what creatinine is and how it reflects the amount of muscle and kidney function a person has.

Most people have two kidneys, but some only have one. There are three main reasons why this could be.

There are many ways to help delay kidney failure, especially when chronic kidney disease (CKD) is diagnosed in the earlier stages.

Learn about end stage kidney disease (ESKD), the last stage (stage five) of chronic kidney disease (CKD).

Chronic kidney disease (CKD) is the gradual loss of the kidneys' ability to filter waste from the blood.

Stage 5 of CKD (also known as end stage kidney disease, or ESKD) is when kidneys function below 10 to 15 percent of their normal capacity.

Although it’s scary to be diagnosed with chronic kidney disease (CKD), if you find out in the early stages of the disease, there are steps you can take to prolong kidney function.