Are you concerned about your kidney health? The Cystatin C test may just be a game-changer for you. This simple blood test can help in the early detection of kidney disease, allowing for timely intervention and treatment. In this blog, we will dive deep into what the Cystatin C test is, why it is important to get tested, when to get tested, and how to prepare for the test. We will also answer common questions about the test, such as how it is used, what the results mean, and much more. If you want to take control of your kidney health and make informed decisions, keep reading. Plus, we'll share a valuable resource where you can buy the Cystatin C test at an affordable price.

Cystatin C with Estimated Glomerular Filtration Rate (eGFR), Serum

Cystatin C, a biomarker for kidney function, offers advantages over traditional markers like creatinine. The Cystatin C test is performed by measuring the level of cystatin C in the blood serum. The test provides a more accurate estimation of the glomerular filtration rate (GFR), which reflects kidney function. Incorporating Cystatin C testing into routine kidney disease screening and monitoring has the potential to improve the diagnosis and management of conditions like chronic kidney disease. By utilizing this cystatin C-based test, healthcare providers can obtain valuable information about renal function without invasive procedures or relying solely on creatinine levels.

Cystatin C Test at a Glance

The cystatin C test is a highly accurate indicator of kidney function, surpassing traditional tests. Its ability to detect early signs of kidney disease allows for timely intervention and treatment. This test is particularly beneficial for individuals with risk factors like diabetes or high blood pressure. Monitoring cystatin C levels helps track the progression of kidney disease and assess treatment effectiveness. Incorporating the cystatin C test into routine screenings can save lives and enhance overall kidney health.

Why Get Tested?

Getting tested for cystatin C is important, as it can detect early signs of kidney dysfunction or disease more accurately than traditional markers. Regular testing helps monitor kidney disease progression and guide treatment decisions. Early detection and management can prevent further damage and improve outcomes.

When To Get Tested?

It is advisable to undergo a cystatin C test if you have risk factors for kidney disease, such as diabetes or high blood pressure. Additionally, if you experience symptoms like frequent urination, fatigue, or swelling in the hands and feet, it is recommended to get tested. Your doctor may also suggest a cystatin C test if you are taking medications that could potentially impact kidney function. If you already have kidney disease or are receiving treatment for it, regular monitoring with a cystatin C test may be necessary.

What Test Preparation Needed?

The Cystatin C test does not need any specific preparation, but it's essential to inform your healthcare provider about any medications or supplements. Fasting for a few hours prior to the test is recommended, but follow your healthcare provider's instructions for accurate results.

What is Being Tested?

The Cystatin C test measures the amount of cystatin C, a protein produced by cells and filtered by the kidneys, in the blood. It helps evaluate kidney function and identify potential kidney disease at an early stage. Elevated levels of cystatin C may suggest impaired kidney function.

Common Questions About Cystatin C Test

What is a cystatin C test, and how does it help detect kidney disease? How accurate is the cystatin C test compared to other tests for kidney function? Who should consider getting a cystatin C test? Are there any limitations or drawbacks to the cystatin C test? How can the results of a cystatin C test be used in diagnosing and managing kidney disease? How does the cystatin C test compare to a creatinine test for kidney function assessment?

How is it used?

The Cystatin C test is a blood test that measures the cystatin C level in the blood. It aids in assessing kidney function and identifying early signs of kidney disease. When used alongside other tests like creatinine, it provides a more precise evaluation. The results of this test play a crucial role in determining treatment plans and monitoring the progression of kidney disease.

When is the Cystatin C test ordered?

The Cystatin C test is usually ordered to evaluate kidney function in various situations, including when there are signs of kidney disease, to monitor kidney function in individuals with known kidney problems, and as part of routine check-ups to detect and prevent kidney disease early.

Who May Need a Cystatin C Test?

The cystatin C test (which also includes estimated creatinine clearance eGFR) can be done along with the creatinine or creatinine clearance test in cases where those tests aren’t appropriate, such as:

  • Patients taking creatine supplements for bodybuilding. These supplements can increase creatinine and decrease creatinine clearance, which can alarm doctors who fear kidney dysfunction. This creatinine increase is not clinically relevant, but running a Cystatin C test can give physicians reassurance and allow the patient to keep taking that effective bodybuilding supplement.
  • In patients with cirrhosis
  • Cases of morbid obesity
  • Malnourishment
  • Reduced muscle mass

Since the concentration of cystatin C in the blood will not change due to infection or inflammation and isn’t affected by body weight, drugs, or diet, cystatin C level could be a more reliable indicator of kidney health than creatinine.

Testing for cystatin may also be useful to detect kidney disease early when the affected person isn’t experiencing many (if any) symptoms, and other tests like creatinine and eGFR results are normal.

What does the test result mean?

The test result measures cystatin C levels in your blood. A high level may suggest kidney problems, while a low level usually indicates normal kidney function. It's crucial to consult a healthcare professional for an accurate interpretation of your test result.

Is there anything else I should know?

The Cystatin C test is a more accurate way to measure kidney function and can detect early signs of kidney disease. No fasting or special preparations are needed for the test, but it's important to discuss the results with your healthcare provider for proper interpretation and guidance.

How is an eGFR calculated?

The eGFR (estimated glomerular filtration rate) is calculated using the MDRD equation, which factors in variables like blood creatinine level, age, gender, and race. It's important to remember that eGFR is an estimate and may not be completely accurate for every individual.

How can my actual GFR be determined?

To determine your actual GFR (glomerular filtration rate), a blood test is necessary. The most accurate way to measure GFR is by assessing the level of cystatin C in the blood, which reflects kidney function. It's crucial to consult with a healthcare professional for proper interpretation and understanding of your kidney function based on the test results.

Related Tests

- A creatinine test measures the level of creatinine in the blood, a marker of kidney function.

- The urine albumin test detects albumin, indicating kidney damage.

- Glomerular filtration rate (GFR) calculates how well the kidneys filter waste.

- The blood urea nitrogen (BUN) test measures nitrogen levels, indicating kidney function.

- Kidney ultrasound creates images for further evaluation.


What is Cystatin C, and how does it differ from other kidney function tests? Discover the benefits of using the Cystatin C test for kidney disease detection. Learn about the accuracy of the Cystatin C test compared to traditional methods and its potential impact on the early detection and treatment of kidney disease. Find additional information and resources on the Cystatin C test and kidney health at reputable sources such as the National Kidney Foundation and KDIGO.


The cystatin c test is an important tool in detecting kidney disease. To learn more about this test, you can refer to reputable sources such as the National Kidney Foundation, the Mayo Clinic, the American Association for Clinical Chemistry, and the National Institute of Diabetes and Digestive and Kidney Diseases. These sources provide valuable information on the test, its purpose, and how it can help in assessing kidney function. Make sure to consult these resources for reliable and up-to-date information.

How to Purchase a Low-Cost Cystatin C Test at

The Cystatin C test is a game-changer in kidney disease detection, offering the convenience and affordability of purchasing the test online at Early detection is crucial in managing kidney disease, and the Cystatin C test provides a more accurate assessment of kidney function compared to traditional methods like serum creatinine. By ordering the test through, you can easily access your test results and take proactive steps towards preserving your kidney health. Take advantage of the affordable and convenient option of purchasing the Cystatin C test at to prioritize your kidney health today.



The cystatin C test is a game-changer when it comes to detecting kidney disease. It provides a more accurate measurement of kidney function compared to traditional tests. By measuring the level of cystatin C in your blood, healthcare professionals can assess your glomerular filtration rate (GFR) and identify any potential kidney problems early on. Early detection is crucial for effective treatment and management of kidney disease. If you suspect that you may be at risk or want to monitor your kidney health, consider getting a cystatin C test. At, we offer affordable and reliable cystatin C testing. Take control of your kidney health today and order your test.