Longevity Diagnostics: A Guide to Measuring Your Biological Age
The term "longevity" is everywhere. Tech billionaire Bryan Johnson reportedly spends over two million dollars a year to measure and optimize his body. The underlying idea is not new: the goal is to…
The term "longevity" is everywhere. Tech billionaire Bryan Johnson reportedly spends over two million dollars a year to measure and optimize his body. The underlying idea is not new: the goal is to extend not just lifespan, but more importantly, healthspan—the number of years spent in good physical and mental health.
Beyond the public hype, a new field is emerging within serious medicine: data-driven prevention. This isn't about miracle cures, but the systematic application of advanced diagnostics to identify health risks years or even decades before the first symptoms appear. This comprehensive form of longevity diagnostics has arrived.
This article explains what's behind the buzzwords: which methods are scientifically sound, which biomarkers truly matter, and what a comprehensive health status looks like today—far beyond what a standard check-up can provide.
What Is Biological Age, and Why Is It More Important Than Your Birth Date?
Your chronological age is the number on your ID. It tells you how many times the earth has revolved around the sun since you were born. Your biological age, however, describes the state of your body at a cellular and molecular level—a measure of the actual wear and tear and functional capacity of your organ systems.
Two people can both be 50 years old. One might have the biological age of a 40-year-old, while the other has that of a 60-year-old. The latter has a statistically higher risk of developing a chronic disease in the coming years. Biological age is therefore a much better predictor of future health and mortality than birth date alone (Jazwinski & Kim, 2019).
Biological age is not a verdict. It is a prognostic indicator, a baseline. Measuring it is the starting point for targeted interventions, the success of which can be objectified through a follow-up measurement.
The Science of Epigenetic Clocks: DNA Methylation and Biological Aging
The most precise method for determining biological age is based on epigenetics. Think of your DNA as a computer's hardware. Epigenetics is the software that determines which genes are turned on or off. One of the most important epigenetic mechanisms is DNA methylation.
This process involves attaching small chemical groups, called methyl groups, to the DNA. These markers do not change the genetic code itself but regulate gene activity. As we age, this pattern of methylation changes in a predictable way.
How DNA Methylation Measures Age
Researchers have developed algorithms that can analyze these methylation patterns and calculate biological age from them. These algorithms are called "epigenetic clocks." They analyze hundreds of thousands of positions in the genome and compare the patterns to those of a large reference population.
The Leading Epigenetic Clocks: Horvath, GrimAge, and DunedinPACE
In recent years, different generations of these clocks have been developed:
- The Horvath Clock (1st Generation): Developed by Steve Horvath in 2013, this was the first clock that worked across various tissue and cell types. It is a robust marker of chronological age but a weaker predictor of disease risks (Horvath, 2013).
- GrimAge (2nd Generation): Developed in 2019, this clock was not trained to predict chronological age, but rather time until death. GrimAge is based on surrogate markers for plasma proteins and smoking behavior and correlates strongly with the risk of heart disease, cancer, and life expectancy (Lu et al., 2019).
- DunedinPACE (3rd Generation): This latest generation of clocks does not measure age itself, but the current pace of aging. Derived from the decades-long Dunedin Longitudinal Study in New Zealand, DunedinPACE indicates how many biological years a person is aging per chronological year. A value below 1.0 means you are aging more slowly than the population average (Belsky et al., 2022).
In the YEARS Evolve® and Ultimate® programs, we analyze a panel of seven different epigenetic clocks to obtain a multidimensional picture of the aging process.
Which Biomarkers Are Truly Predictive of Future Health?
A single value says little. Only the comprehensive analysis of dozens of carefully selected biomarkers provides a meaningful picture. Modern longevity diagnostics go far beyond what is typically measured at a family doctor's office.
Re-evaluating Cardiovascular Risk: ApoB, Lp(a), and hs-CRP
Cardiovascular diseases are the number one cause of death. Standard diagnostics often focus on LDL cholesterol, which only captures part of the risk.
- ApoB (Apolipoprotein B): Every potentially artery-clogging (atherogenic) lipid particle in the blood carries exactly one ApoB molecule on its surface. Measuring ApoB thus provides the exact number of these particles, a more precise risk marker than LDL cholesterol, which only measures the weight of the cholesterol inside the particles (Sniderman et al., 2019).
- Lp(a) (Lipoprotein(a)): A genetically determined risk factor for heart attack and stroke. About 20% of the population has elevated levels without knowing it, as Lp(a) is not measured in a standard blood panel.
- hs-CRP (high-sensitivity C-reactive protein): A marker for chronic, low-grade inflammation in the body, which is a central driver of atherosclerosis. The JUPITER study showed that hs-CRP is an independent risk factor for cardiovascular events (Ridker et al., 2008).
All three markers are included as standard in the blood panel of the YEARS Core® Program.
Metabolic Health Beyond Blood Sugar: HOMA-IR and OGTT
Type 2 diabetes develops over many years. Long before fasting blood sugar rises, the body is already struggling with insulin resistance.
- HOMA-IR (Homeostasis Model Assessment of Insulin Resistance): This index is calculated from fasting blood glucose and fasting insulin. It quantifies insulin resistance and can reveal problems long before standard diagnostics do.
- OGTT (Oral Glucose Tolerance Test): In this test, the body's response to a standardized sugar solution is measured over two hours. It is considered the gold standard for diagnosing prediabetes and diabetes and uncovers disorders that a single fasting value might miss.
Other Crucial Markers
NT-proBNP (a sensitive marker for cardiac stress), Vitamin D, and Ferritin (stored iron) are part of the YEARS Core® program. The YEARS Evolve® program goes deeper with an expanded hormone status panel: Testosterone, DHEA-S, and Cortisol provide targeted insights into energy, libido, and stress regulation.
Longevity Diagnostics vs. a Standard Health Check-Up
A standard government-sponsored health screening, like the German "Check-up 35," is an important but narrowly limited preventive service. A direct comparison shows the profound difference in depth between the two approaches:
Standard Health Screening (e.g., "Check-up 35" in Germany):
- Biomarkers: Approx. 10 markers (fasting glucose, total, HDL, LDL cholesterol, limited blood count, urine status)
- Diagnostics: Blood pressure, height, weight
- Imaging: None
- Functional Tests: None
- Analysis: Brief doctor's consultation, often without a synthesis of the findings
YEARS Core® Program:
- Biomarkers: 87+ markers, including ApoB, hs-CRP, HOMA-IR, NT-proBNP, Vitamin D, Ferritin, and comprehensive liver, kidney, and thyroid panels
- Cardiovascular: 12-lead ECG, arterial stiffness, ankle-brachial index
- Imaging: Advanced ultrasound of the heart, abdominal organs, thyroid, and blood vessels
- Functional Tests: Body plethysmography for precise lung function measurement, VO₂max as a strong predictor of all-cause mortality
- AI-powered Diagnostics: Full-body skin screening with a 96.7% detection rate and retinal analysis via AI fundoscopy
- Body Composition: 3D body scan and bioimpedance analysis
- Analysis: A 60-page health report and an in-depth strategy session with a physician who integrates all findings and creates a prioritized action plan
The difference lies not only in the number of tests but in the systematic integration of all data into a holistic picture.
The Next Level of Prevention: Advanced Imaging and Molecular Diagnostics
For those who want to look even deeper, whole-body MRI and liquid biopsy offer new possibilities.
Whole-Body MRI: Structural Analysis from Head to Toe
A whole-body MRI creates detailed cross-sectional images of the body from head to pelvis without using X-ray radiation. It can make structural abnormalities such as tumors, inflammatory lesions, or aneurysms visible at an early stage. While not a replacement for specific screening tests like colonoscopy, it is a meaningful supplement. At YEARS, a whole-body MRI following a proprietary protocol is an integral part of the Evolve® and Ultimate® programs.
Liquid Biopsy: Cancer Early Detection from a Blood Sample
A liquid biopsy detects circulating tumor DNA (ctDNA) in the blood. It allows for screening for dozens of cancer types, often before they would be visible in imaging. The method used at YEARS (TruCheck) can potentially detect over 70 different solid tumors. The technology is in active clinical development and should be understood as a supplementary screening tool, not a replacement for established methods. It is part of the Evolve® and Ultimate® programs. You can find more information on our page about liquid biopsy at YEARS.
Genomics and Microbiomics: A Look into the Code of Life
The YEARS Ultimate® Program offers the deepest level of analysis:
- Medical Genetics: Using whole-exome and whole-genome sequencing, we analyze over 170 genes associated with an increased risk of cancer, cardiovascular, and metabolic diseases. Additionally, pharmacogenetics for over 150 drugs are evaluated to predict their efficacy and side effects individually.
- Microbiomics: A detailed analysis of the gut flora (bacteria and fungi) provides insights into its influence on metabolism, the immune system, and mental health.
The YEARS Approach: Clinic-as-a-Study and the Biobank
YEARS operates as a "Clinic-as-a-Study." Every client is invited to become part of a prospective clinical registry. The anonymized data helps to establish normative aging curves for the German-speaking population and to supply longevity research with real-world clinical data. Learn more about our mission on our About Us page.
A special feature of the Evolve® and Ultimate® programs is the YEARS Biological Safe. We cryopreserve 70 samples (blood, stool, urine, etc.) at -80°C as a personal biobank. If new diagnostic tests become available in the future, we can access your original samples and perform analyses that do not yet exist today.
Your Data-Driven Health Plan
Modern longevity diagnostics is not a random collection of high-tech tests. It is a systematic process: data becomes knowledge, and knowledge becomes an actionable plan. Instead of waiting for the first symptoms, you create a scientifically-backed baseline of your body, identify your individual risks, and receive a physician-guided strategy.
If you want to go beyond the standard check-up and take a proactive approach to your health, speak with our team. In a free initial consultation, we can clarify which program is right for your goals.
Schedule a Consultation Now
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This article is for general informational purposes only and does not constitute individual medical advice. The diagnostic procedures described are for prevention and risk stratification and are not a form of treatment.
Sources
Belsky, D. W., et al. (2022). DunedinPACE, a DNA methylation biomarker of the pace of aging. eLife, 11, e73420. DOI: 10.7554/eLife.73420
Horvath, S. (2013). DNA methylation age of human tissues and cell types. Genome Biology, 14(10), R115. DOI: 10.1186/gb-2013-14-10-r115
Jazwinski, S. M., & Kim, S. (2019). Examination of the Dimensions of Biological Age. Frontiers in Genetics, 10, 263. DOI: 10.3389/fgene.2019.00263
Lu, A. T., et al. (2019). DNA methylation GrimAge strongly predicts lifespan and healthspan. Aging, 11(2), 303-327. DOI: 10.18632/aging.101684
Ridker, P. M., Danielson, E., Fonseca, F. A., et al. for the JUPITER Study Group. (2008). Rosuvastatin to Prevent Vascular Events in Men and Women with Elevated C-Reactive Protein. New England Journal of Medicine, 359(21), 2195-2207. DOI: 10.1056/NEJMoa0807646
Sniderman, A. D., et al. (2019). Apolipoprotein B: A Cardiovascular Risk Factor Whose Time Has Come. The Canadian Journal of Cardiology, 35(10), 1275-1283. DOI: 10.1016/j.cjca.2019.05.018
Related reading: Executive Health Check-up 2026: What's Covered & What's Not | VO2 Max Testing & Performance Diagnostics for Longevity | What Is a Longevity Check-Up? Tests, Biomarkers & Costs | Epigenetic age testing
Frequently asked questions on this topic
How accurate are biological age tests?
Epigenetic clocks are research and prediction instruments. They are not an exact diagnosis and not a perfect forecast for any individual. Their strength lies in risk stratification and in tracking change over time, particularly when read alongside other clinical data. Models such as GrimAge and DunedinPACE show a relevant association with morbidity and mortality in studies (Lu et al., Aging 2019; Belsky et al., eLife 2022). The jump from study population to the individual person is exactly where the market regularly overpromises. Different clocks return different values for the same sample, and measurement precision on repeat testing is limited. Read the number as one input, not as a verdict.
Can you lower your biological age?
This deserves careful wording. There is evidence that lifestyle interventions can influence epigenetic patterns (Waziry et al., CALERIE-RCT, Nat Aging 2023). What that means in the long run for hard clinical endpoints is not conclusively settled in every respect. The more honest formulation is therefore: you can probably influence ageing dynamics and risk profiles; whether and to what extent biological age in the narrow sense can be durably lowered depends heavily on the measurement method and the clinical context. What is robust is that exercise, nutrition, sleep and stress management measurably improve blood pressure, blood lipids, insulin sensitivity and cardiorespiratory fitness. Steer by those.
What do longevity diagnostics cost in Germany?
Costs vary widely. At YEARS the prices are transparent: the Core® Program costs 1,900 euros, Evolve® costs 7,600 euros and Ultimate® costs 16,900 euros. Billing is based on the official German medical fee schedule (GOÄ), which is the precondition for submitting anything to a private insurer at all, not a promise of reimbursement. Whether and how much is reimbursed is decided solely by your insurer, based on tariff, medical indication and case review. In practice, entries with a recognisable medical indication are reimbursed more often than purely preventive components, which make up the larger part of a screening program. People with statutory insurance generally bear the full cost.
How often should you do these checks?
An annual follow-up is useful in many cases, because preventive medicine lives on trends rather than single points. That said, the right interval depends on your age, your risk profile, your baseline findings and whatever measures you have started. For young, symptom-free people without family history, two to three years between the large panels is often enough, with individual abnormal values checked more frequently in between. More important than frequency is comparability: the same laboratory, fasted, ideally the same season. Measuring more often mostly shows measurement variation, because many markers need months to respond to behavioural change at all. A single reading without history tells you comparatively little.
