eGFR / Cystatin C
The eGFR (estimated Glomerular Filtration Rate) / Cystatin C Ratio is a significant marker offering vital insights into kidney function and health. Glomerular filtration rate (GFR) is a test that measures the flow rate of filtered fluid through the kidneys, serving as a critical indicator of kidney health. eGFR is an estimated value derived from blood creatinine levels, age, sex, and race, providing a non-invasive assessment of kidney function. Cystatin C, on the other hand, is a protein produced by all nucleated cells in the body, and its level in the blood inversely correlates with kidney function. Unlike creatinine, Cystatin C levels are less influenced by muscle mass, age, or diet, making it a potentially more accurate marker of kidney function for certain populations. By evaluating the eGFR/Cystatin C ratio, healthcare providers can gain a more nuanced understanding of kidney function. This ratio can be particularly useful in cases where creatinine-based eGFR might be less reliable, such as in elderly patients, those with significant muscle mass changes, or in people with a vegetarian diet. A higher ratio may indicate better kidney function, while a lower ratio could suggest impaired kidney health. This marker, part of the comprehensive Kidney Test panel from Boston Heart Diagnostics, helps in diagnosing and managing kidney diseases more effectively, enabling personalized treatment strategies to maintain or improve kidney health.
All Your Lab Results.
One Simple Dashboard.
Import, Track, and Share Your Lab Results Easily
Import, Track, and Share Your Lab Results
Import lab results from multiple providers, track changes over time, customize your reference ranges, and get clear explanations for each result. Everything is stored securely, exportable in one organized file, and shareable with your doctor—or anyone you choose.
Cancel or upgrade anytime
What does it mean if your eGFR / Cystatin C result is too low?
A low eGFR result based on Cystatin C suggests that your kidneys may not be filtering waste from your blood as efficiently as they should. This test uses a protein called Cystatin C—which is produced at a steady rate by all cells in the body—as a marker to estimate how well your kidneys are working.
Key Points About Low eGFR (Cystatin C)
-
eGFR is a measure of kidney filtration rate.
Lower numbers indicate reduced kidney function. -
Below 60 mL/min/1.73 m² is considered below normal and may suggest chronic kidney disease (CKD) if sustained over 3 months.
-
Cystatin C is often used in people where creatinine-based eGFR might be misleading, such as older adults, those with low muscle mass, or certain chronic illnesses.
Possible Causes of Low eGFR (Cystatin C)
-
Chronic kidney disease (CKD)
-
High blood pressure or diabetes
-
Heart failure
-
Dehydration (temporary)
-
Age-related decline in kidney function
What You Can Do
-
Follow up with your doctor for further evaluation, especially if the result is consistently low.
-
They may recommend:
-
Additional kidney tests (creatinine, urinalysis, imaging)
-
Monitoring for protein in the urine
-
Managing contributing conditions (e.g., high blood pressure, diabetes)
-
Why This Test Matters
Cystatin C-based eGFR can provide a more accurate picture of kidney function, especially when creatinine levels are unreliable. It’s a valuable tool for early detection of kidney disease before symptoms appear.
Laboratories
Bring All Your Lab Results Together — In One Place
We accept reports from any lab, so you can easily collect and organize all your health information in one secure spot.
Pricing Table
Gather Your Lab History — and Finally Make Sense of It
Finally, Your Lab Results Organized and Clear
Personal plans
$79/ year
Advanced Plan
Access your lab reports, explanations, and tracking tools.
- Import lab results from any provider
- Track all results with visual tools
- Customize your reference ranges
- Export your full lab history anytime
- Share results securely with anyone
- Receive 5 reports entered for you
- Cancel or upgrade anytime
$250/ once
Unlimited Account
Pay once, access everything—no monthly fees, no limits.
- Import lab results from any provider
- Track all results with visual tools
- Customize your reference ranges
- Export your full lab history anytime
- Share results securely with anyone
- Receive 10 reports entered for you
- No subscriptions. No extra fees.
$45/ month
Pro Monthly
Designed for professionals managing their clients' lab reports
- Import lab results from any provider
- Track lab results for multiple clients
- Customize reference ranges per client
- Export lab histories and reports
- Begin with first report entered by us
- Cancel or upgrade anytime
About membership
What's included in a Healthmatters membership
Import Lab Results from Any Source
See Your Health Timeline
Understand What Your Results Mean
Visualize Your Results
Data Entry Service for Your Reports
Securely Share With Anyone You Trust
Let Your Lab Results Tell the Full Story
Once your results are in one place, see the bigger picture — track trends over time, compare data side by side, export your full history, and share securely with anyone you trust.
Bring all your results together to compare, track progress, export your history, and share securely.
What Healthmatters Members Are Saying
Frequently asked questions
Healthmatters is a personal health dashboard that helps you organize and understand your lab results. It collects and displays your medical test data from any lab in one secure, easy-to-use platform.
- Individuals who want to track and understand their health over time.
- Health professionals, such as doctors, nutritionists, and wellness coaches, need to manage and interpret lab data for their clients.
With a Healthmatters account, you can:
- Upload lab reports from any lab
- View your data in interactive graphs, tables, and timelines
- Track trends and monitor changes over time
- Customize your reference ranges
- Export and share your full lab history
- Access your results anytime, from any device
Professionals can also analyze client data more efficiently and save time managing lab reports.
Healthmatters.io personal account provides in-depth research on 10000+ biomarkers, including information and suggestions for test panels such as, but not limited to:
- The GI Effects® Comprehensive Stool Profile,
- GI-MAP,
- The NutrEval FMV®,
- The ION Profile,
- Amino Acids Profile,
- Dried Urine Test for Comprehensive Hormones (DUTCH),
- Organic Acids Test,
- Organix Comprehensive Profile,
- Toxic Metals,
- Complete Blood Count (CBC),
- Metabolic panel,
- Thyroid panel,
- Lipid Panel,
- Urinalysis,
- And many, many more.
You can combine all test reports inside your Healthmatters account and keep them in one place. It gives you an excellent overview of all your health data. Once you retest, you can add new results and compare them.
If you are still determining whether Healthmatters support your lab results, the rule is that if you can test it, you can upload it to Healthmatters.
We implement proven measures to keep your data safe.
At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put industry-leading security standards in place to help protect against the loss, misuse, or alteration of the information under our control. We use procedural, physical, and electronic security methods designed to prevent unauthorized people from getting access to this information. Our internal code of conduct adds additional privacy protection. All data is backed up multiple times a day and encrypted using SSL certificates. See our Privacy Policy for more details.