Cystatin C

Experiencing fatigue, fluid retention, or changes in urination? These may be early signs of kidney dysfunction. A Cystatin C Test is a simple blood test that measures Cystatin C levels, a protein that serves as a sensitive marker for kidney function. Unlike other markers, Cystatin C can help estimate your glomerular filtration rate (GFR)—a key indicator of how well your kidneys are filtering waste—even before significant changes appear in traditional kidney tests. Elevated Cystatin C levels may signal reduced kidney function or early kidney disease. Monitoring Cystatin C levels allows healthcare providers to assess kidney health, track disease progression, and make informed treatment decisions. Regular Cystatin C testing is an important step for renal health screening and proactive management of chronic kidney disease.