OneDayTests Cystatin C Blood Test
Type
Blood Testing
Biomarkers
4
Duration
30 min
Results
24 hours
This tests the level of Cystatin C in your blood - a marker addressing kidney issues and monitoring.
A kidney function panel evaluates how effectively your kidneys are filtering waste from your blood. The kidneys process around 200 liters of blood daily, removing toxins, balancing electrolytes, and regulating blood pressure. Key markers include creatinine (a waste product from muscle metabolism filtered by the kidneys), BUN/urea (a breakdown product of protein), and eGFR (estimated glomerular filtration rate — the gold standard for measuring kidney function). Some panels also include cystatin C, which provides a more accurate filtration estimate independent of muscle mass. Chronic kidney disease affects roughly 10% of adults worldwide and is often called a "silent" disease because it typically causes no symptoms until advanced stages.
Key Details
Who Is This For?
People with diabetes or high blood pressure — the two leading causes of kidney disease. Anyone taking medications that can affect kidney function (NSAIDs, certain antibiotics, ACE inhibitors). Those over 60, as kidney function naturally declines with age. Individuals with a family history of kidney disease or who have had recurrent urinary tract infections.
What's Included
Preparation Required
Fasting for 10–12 hours before your appointment is recommended for accurate results (water is fine). Avoid alcohol for 24 hours and intense exercise for 12 hours before the blood draw. Morning appointments are ideal for consistent hormone and glucose readings. The blood draw typically takes 5–10 minutes.
Biomarkers Tested
4A metal found in canned foods, solder, and industrial materials. While small amounts of inorganic tin are relatively non-toxic, high levels can cause gastrointestinal irritation. Organotin compounds are more toxic and affect the immune and nervous systems.
A waste product from normal muscle metabolism, filtered by the kidneys. Blood creatinine levels reflect kidney filtration capacity. Elevated levels may indicate impaired kidney function, dehydration, or excessive muscle breakdown.
A waste product from protein breakdown, processed by the liver and excreted by the kidneys. Elevated urea levels can indicate kidney dysfunction, dehydration, high-protein diet, or gastrointestinal bleeding.
An estimated measure of how well your kidneys filter waste from the blood. It's calculated from creatinine levels, age, sex, and race. eGFR is the primary marker used to stage chronic kidney disease.
Available at 29 locations
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- Category
- Diagnostic
- Sample Type
- Blood draw
- Duration
- 30 min
- Results
- 24 hours
OneDayTests
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