Description
A cystatin C test measures the amount of cystatin C in your blood to assess kidney function. Cystatin C is a protein produced by cells throughout your body.
What the test measures
- Cystatin C levels: The amount of cystatin C in your blood
- Kidney function: How well your kidneys are filtering cystatin C out of your blood
Why the test is performed
- To screen for and monitor kidney dysfunction
- To detect kidney disease early
- To confirm a diagnosis of chronic kidney disease (CKD)
- To check the progress of kidney disease
Fasting not required.
