Cystatin C

Cystatin C is a powerful protein marker for evaluating kidney health. Unlike standard creatinine tests, this measure is less affected by muscle mass, diet, or age, offering a more precise, muscle-independent view of filtration effectiveness. It is often used to confirm or rule out chronic kidney disease when creatinine eGFR results are borderline or to guide safer dosing of kidney-cleared medicines. Adding this test to your health profile can help refine disease staging, assess cardiovascular risk, and detect reduced filtration that may explain symptoms like fatigue or high blood pressure, giving you a clearer picture of your long-term health outcomes.