Key Takeaways
- The best longevity testing combines traditional blood tests with newer biological age and advanced cardiovascular biomarkers, rather than relying on a single measurement.
- Emerging technologies such as epigenetic clocks, continuous glucose monitoring and AI-assisted health analysis are improving our understanding of biological ageing, although many are still evolving.
- Tracking changes over time is more valuable than a single result, helping you understand how lifestyle habits influence healthy ageing.
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📖 5 min readA decade ago, most longevity testing focused on standard blood tests and genetics. Today, the field has evolved rapidly. New research is shifting attention towards biological age, advanced cardiovascular risk markers, continuous metabolic monitoring and multi-biomarker assessments that provide a more complete picture of how your body is ageing.
Importantly, no single test can tell you exactly how long you will live. Instead, the most valuable longevity tests identify biological processes that influence healthy ageing, allowing you and your healthcare professional to monitor changes over time and support long-term wellbeing.
How Longevity Testing Has Changed
Longevity testing has advanced considerably in recent years. Rather than focusing solely on disease risk, researchers are increasingly measuring healthspan—the number of years your body functions well. Healthspan reflects how effectively your cardiovascular system, metabolism, muscles, immune system and brain continue to perform as you age (R).
This shift has introduced newer tests that measure biological ageing directly, alongside traditional assessments that remain highly valuable. Together, they provide a more complete understanding of your long-term health.
What Is Healthspan?
Healthspan refers to the period of life spent in generally good health and function. Longevity testing increasingly looks beyond lifespan alone to understand how well important systems such as your heart, metabolism, muscles and brain are functioning as you age (R).
Standard Blood Tests Still Form the Foundation
Although newer technologies attract attention, routine pathology remains one of the most evidence-supported ways to monitor healthy ageing. Blood biomarkers provide objective information about multiple physiological systems before symptoms become noticeable.
Some of the most useful blood tests include:
- Full blood count (FBC)
- Kidney and liver function
- Lipid profile (total cholesterol, LDL, HDL and triglycerides)
- Fasting glucose
- HbA1c
- Iron studies
- Vitamin B12
- Vitamin D
- Thyroid function
- Electrolytes
Tracking these markers over many years often provides more useful information than a single isolated measurement. Large cohort studies consistently demonstrate that maintaining healthy blood pressure, blood glucose and cholesterol levels is associated with longer life expectancy and improved healthspan (R).
Why Trends Matter
A single blood test provides a snapshot in time. Repeating appropriate tests over months and years can reveal whether important health markers are improving, remaining stable or moving in an unfavourable direction.
Advanced Cardiovascular Biomarkers Are Becoming More Important
One of the biggest developments since our previous guide is the increasing use of advanced cardiovascular risk markers. Researchers now recognise that standard cholesterol testing does not capture every aspect of cardiovascular risk.
Healthcare professionals may also assess:
- Apolipoprotein B (ApoB)
- Lipoprotein(a) [Lp(a)]
- High-sensitivity C-reactive protein (hs-CRP)
Apolipoprotein B measures the number of cholesterol-containing particles circulating in your bloodstream and is considered by many researchers to be a useful indicator of cardiovascular risk beyond LDL cholesterol alone (R).
Meanwhile, Lipoprotein(a) is largely genetically determined and has emerged as an independent cardiovascular risk factor that standard cholesterol tests cannot identify (R). These biomarkers are increasingly incorporated into preventive cardiovascular assessment and represent an important update from earlier longevity testing approaches.
Important to Remember
More testing is not automatically better. Which cardiovascular biomarkers are appropriate depends on your age, medical history, family history and existing risk factors. Your healthcare professional can help determine which assessments are useful for you.
Biological Age Testing Has Improved Significantly
Perhaps the most exciting advance is the growing availability of biological age testing. Unlike chronological age, biological age estimates aspects of how your body is ageing based on measurable biological changes.
Many of today’s biological age tests analyse DNA methylation. DNA methylation is a natural chemical process that regulates gene activity without changing the DNA sequence itself. As we age, predictable methylation patterns change across the genome. Researchers have developed epigenetic clocks that estimate biological age using these methylation patterns (R).
More recent generations of epigenetic clocks—including GrimAge and DunedinPACE—aim to capture aspects of health risk or the pace of biological ageing rather than simply estimating chronological age (R). Although these tests continue to evolve, they represent one of the most significant advances in longevity science in recent years.
What Is an Epigenetic Clock?
An epigenetic clock uses patterns of DNA methylation to estimate aspects of biological ageing. Newer clocks are being developed to assess not only biological age but also how quickly age-related biological changes may be occurring.
Continuous Glucose Monitoring Is Expanding Beyond Diabetes Care
Another emerging trend is the use of continuous glucose monitors (CGMs). A CGM is a small wearable sensor that measures glucose levels throughout the day and night. Originally developed for people with diabetes, researchers are now studying how CGMs may help healthy adults understand their individual responses to meals, exercise, sleep and stress.
Studies show that glucose responses can vary considerably between individuals eating identical foods, highlighting the complexity of personalised metabolism (R).
While evidence continues to develop, CGMs are becoming valuable research tools for understanding metabolic health and healthy ageing. Their usefulness in people without diabetes continues to be investigated.
Muscle Strength Is Emerging as a Powerful Longevity Marker
One of the simplest additions to longevity assessment requires no blood test at all. Growing evidence suggests that muscle strength, particularly hand grip strength, is strongly associated with long-term health outcomes. Grip strength reflects overall muscle function and has been linked with healthy ageing across multiple populations.
A large international study involving more than 140,000 participants found lower grip strength was associated with increased all-cause and cardiovascular mortality (R). Researchers increasingly view muscle health as an essential component of healthy longevity rather than simply physical fitness.
Longevity Testing Is More Than Blood Tests
Measures such as strength, fitness and physical function can add valuable context to laboratory results. Healthy ageing is ultimately about maintaining your ability to function well, not simply achieving ideal numbers on a pathology report.
Wearable Technology Is Providing New Health Insights
Wearable devices have improved dramatically. Many smartwatches now measure:
- Resting heart rate
- Physical activity
- Sleep duration
- Heart rate variability (HRV)
- Walking speed
- Cardiorespiratory fitness estimates
Although consumer devices cannot replace clinical testing, longitudinal data collected over months or years can reveal meaningful health trends. Heart rate variability reflects variation in the timing between heartbeats and can provide information about autonomic nervous system activity. Researchers continue investigating how HRV relates to cardiovascular health, stress and healthy ageing (R). The greatest value comes from observing changes over time rather than focusing on individual daily readings.
Focus on Your Baseline
Wearable measurements can naturally fluctuate from day to day. Rather than comparing yourself with someone else’s numbers, look for meaningful changes from your own usual baseline over longer periods.
What About Genetic Testing?
Genetic testing remains useful, but its role has become more balanced. Earlier longevity discussions often focused heavily on individual genes such as APOE and MTHFR. Today, researchers recognise that genetics are only one part of the healthy ageing picture.
Genetic information may help identify inherited predispositions, but it is generally most useful when interpreted alongside clinical history, blood biomarkers, family history and lifestyle factors rather than in isolation.
Looking Ahead: AI Is Helping Connect the Dots
Artificial intelligence has become one of the biggest developments in longevity research. Rather than replacing healthcare professionals, AI is increasingly being investigated as a way to integrate information from blood tests, imaging, wearable devices, genetics and lifestyle factors into more comprehensive health assessments.
Researchers are also developing multi-omics approaches that combine genomics, proteomics, metabolomics and microbiome analysis to better understand the complex biology of ageing (R).
These technologies remain an active area of research but are likely to play an increasingly important role in how scientists study ageing and personalised health.
The Future Is Multi-Marker
The direction of longevity science is moving away from relying on one supposedly definitive measurement. Combining different types of health information may eventually provide a more useful picture of biological ageing than any single test can offer.
The Bottom Line
The biggest update in longevity testing is that there is no longer a single “best” test. Today’s strongest approach combines routine blood tests, advanced cardiovascular biomarkers, biological age assessment, measures of metabolic health, muscle function and wearable health data to build a broader understanding of how your body is ageing.
Most importantly, the value of longevity testing comes from identifying trends over time rather than chasing individual numbers. When interpreted by your healthcare professional, these assessments may help guide lifestyle choices that support healthy ageing, vitality and long-term wellbeing.
Want to discover the everyday habits that complement your health assessments? Read our related blog on What Is the Simplest Habit That Supports Longevity?
