A few questions help us personalize your report.
Cystatin C is a protein produced at a constant rate by all nucleated cells, filtered freely by your kidneys. Unlike creatinine, it is not affected by muscle mass, diet, or sex, making it a more reliable kidney filtration marker that also independently predicts cardiovascular disease risk. Cystatin C-based eGFR detects kidney function decline 1–2 years earlier than creatinine-based eGFR.
Also known as: Cistatina C, CysC, Cystatin C, Cystatine C, 시스타틴 C, 半胱氨酸蛋白酶抑制剂 C, 胱抑素C
High cystatin C indicates reduced kidney filtration and detects decline earlier than creatinine. Elevated levels also independently predict heart failure and stroke. Low cystatin C reflects excellent kidney filtration.
Standard range is 0.53-0.95 mg/L. Longevity practitioners target below 0.8 mg/L. Cystatin C is unaffected by muscle mass, making it more reliable than creatinine.