Cystatin C

Cystatin C is a protein that is produced in all body cells and filtered from the blood by the kidneys. Since the production of Cystatin C in the body is relatively constant, the value is well-suited for assessing kidney function.

In contrast to creatinine, Cystatin C increases early when kidney performance declines. Therefore, it is considered a sensitive marker for detecting early kidney weakness in a timely manner.