NEW YORK and HOUSTON , Nov. 7, 2025 /PRNewswire/ -- A mismatch between two common tests for kidney function may indicate a higher risk for kidney failure, heart disease, and death, a new study shows.

Evaluating both biomarkers may identify far more people with poor kidney function, and earlier in the disease process.

Health care providers for decades have measured blood levels of the molecule creatinine to track the rate at which kidneys filter waste from muscle breakdown in the bloodstream. According to more recent guidelines, levels of cystatin C, a small protein made by all cells in the body, can also be used to measure kidney function. Since these two tests are influenced by different factors — including some related to disease or aging — using both markers together can provide a

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