Cystatin C is a protein that is produced by the cells in your body. When kidneys are working well, they keep the level of cystatin C in your blood just right.
If you have an abnormally high concentration of cystatin C in your blood, it means you may have a kidney condition, such as chronic kidney disease. Higher levels of cystatin C may also be caused by diabetes, cancer, HIV, hyperthyroidism, or hypothyroidism.
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- WHAT IT TESTS: Measures amount of cystatin C in blood.
- WHY TAKE IT: Screen for various kidney conditions and evaluate kidney function.
- REQUIRES FAST? Yes.