Cystatin C

This test measures the amount of cystatin C in blood to help evaluate kidney function. Cystatin C is filtered out of the blood by the glomeruli, clusters of tiny blood vessels in the kidneys that allow water, dissolved substances, and wastes to pass through their walls while retaining blood cells and larger proteins.

Normal serum cystatin C values range from 0.6 to 1 mg/l.

If you have an abnormally high concentration of cystatin C in your blood, it may mean 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.

How do you reduce cystatin C naturally?

Exercise helps improve kidney function, especially light physical activity on a regular basis. Studies have shown that seniors with stronger muscles have better kidney function. Lose weight if overweight, it also may help bring down your cystatin C levels.