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Cystatin-C is mainly used as a biomarker of kidney function. It has also been suggested that cystatin-C might predict the risk of developing chronic kidney disease, thereby signaling a state of 'preclinical' kidney dysfunction.
Recently, it has been studied for its role in predicting new-onset cardiovascular disease and also seems to play a role in brain disorders, such as Alzheimer's disease.
An 8 to 12 hour fast is required for this blood test. However, drink plenty of water and take your medications as prescribed.
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