Best Biological Age Test: SystemAge vs. Function Health & TruDiagnostic Comparison
Used by thousands of people around the world, the SystemAge test by Generation Lab is the most advanced and comprehensive aging speed test in preventive healthcare.
According to the verified data acquired across platforms, the SystemAge test ranks higher than the Function Health and TruDiagnostic in terms of customer satisfaction, quality of support, and likelihood to recommend.
This advanced test helps you identify what's aging you—before it becomes a problem. It then delivers a detailed report and personalized action plan, so you know exactly what to do if your heart—or any other organ—is showing signs of aging.
Choose SystemAge Test for its “Clinical Accuracy,” & “Organ-Specific Insights”
Generation Lab’s SystemAge Test is the only test that can measure biological aging at the organ level, long before the disease appears. It tests millions of epigenetics and 460 biomarkers from a single blood test.
The company’s goal is to provide actionable, targeted insights for slowing aging and proactively preventing disease.
The following criteria explain why SystemAge is the preferred choice for accurately measuring biological aging speed.
Generation Lab’s SystemAge has a proven clinical accuracy. TruDiagnostic and Function Health don’t.
Let's look at how why SystemAge stands out as the most accurate way to measure biological aging speed.
Out of 1605 test cases across six test categories using blinded controls, SystemAge showed unprecedented clinical accuracy with over 99% successful detection.
Generation Lab’s SystemAge incorporates breakthrough science. TruDiagnostic and Function Health don’t.
Compared to TruDiagnostic and Function Health, Generation Lab’s aging speed test is more accurate, more actionable, and built for real-world clinical use—powered by breakthrough science.The SystemAge test analyzes DNA methylation patterns to detect biological “noise” across all major organs and systems. It not only measures how fast you're aging, but also pinpoints the drivers behind accelerated aging.Already used by over 150 longevity clinics worldwide, SystemAge is trusted to catch early signals of decline—often years before symptoms appear.You’ll uncover not just what’s aging you, but what to do about it. Based on your unique organ age profile, you’ll receive a personalized plan spanning lifestyle, nutrition, and exercise to help slow the aging process using the latest in biomedical science.
Why Clinicians Trust SystemAge?
Over 15,000 wellness and longevity clinics worldwide use the SystemAge test—making it the most advanced and clinically useful aging speed test available today.What sets it apart? Unmatched clinical accuracy. In blinded trials across 1,605 samples, SystemAge demonstrated a 99% success rate in detecting aging-related changes—far beyond any other biological age test on the market.SystemAge is the only test that measures the speed of aging across 19 organ systems, delivering before-and-after data to track progress at a granular level. Clinicians prefer it for its comprehensive insights and its ability to guide precision therapies and personalized care.The test doesn’t just offer clinical value—it drives business value too. Clinics use SystemAge to increase revenue through bundled therapies and retesting programs.Its credibility is further backed by peer-reviewed studies and endorsements from top scientific minds:“We are now ready for Healthcare 3.0, focused on prevention. Generation Lab is the tool I trust.”— Dr. Adeel Khan, Founder & CEO, Eterna Health“Irina and her team are taking cutting-edge research straight out of the lab and applying it to a pressing issue: identifying diseases much earlier than ever before possible using genetic markers.”— Dr. George Church, Robert Winthrop Professor of Genetics, Harvard Medical SchoolStill have questions? Click here to learn more.
It's Time for SystemAge
Generation Lab outperforms TruDiagnostic and Function Health on every front. With SystemAge, you get unmatched clinical accuracy, deep organ-level insights, and a personalized action plan grounded in cutting-edge biotech.It’s not just about knowing you’re aging—it’s about understanding why, and what to do about it before symptoms ever appear.