Best Biological Age Tests 2026: UK Buyer's Guide

The best biological age test in the UK for 2026 is TruAge COMPLETE by TruDiagnostic, available through Lola Health for GBP 380. It analyses over 900,000 DNA methylation markers to deliver the most comprehensive biological age report available anywhere - including organ-specific ageing, pace of ageing, telomere length, and disease risk scores. We've compared every major biological age test available to UK buyers to help you choose the right one.

Your chronological age tells you how many birthdays you've had. Your biological age tells you how well your body is actually ageing. Two people born on the same day can have biological ages that differ by decades, depending on genetics, lifestyle, diet, stress, sleep, and environmental exposures. Understanding this gap is the first step toward doing something about it.

In 2026, several biological age tests are available to UK buyers - but they vary enormously in methodology, comprehensiveness, and scientific validity. Some analyse hundreds of thousands of epigenetic markers. Others look at just a handful. This guide compares every major option, explains what different testing methods measure, and helps you decide which test is worth your money.

What Is a Biological Age Test?

A biological age test measures how old your body is on a cellular level. The most scientifically validated method is DNA methylation analysis (epigenetic testing). DNA methylation refers to chemical modifications on your DNA that change over time in predictable patterns. By measuring methylation at specific sites across your genome (called CpG sites), algorithms can estimate your biological age with remarkable accuracy.

Several "epigenetic clocks" have been developed to interpret methylation data:

• Horvath Clock - The original multi-tissue epigenetic clock (2013), using 353 CpG sites
• Hannum Clock, Blood-based clock using 71 CpG sites
• PhenoAge, Second-generation clock trained on clinical biomarkers and mortality risk
• GrimAge - Predicts lifespan and healthspan based on plasma protein surrogates
• DunedinPACE - Measures your current pace of ageing (how fast you're ageing right now), not just a static age estimate
• OMICmAge - Third-generation clock integrating multi-omic data for greater accuracy
• SYMPHONYAge - Organ-specific ageing algorithm that estimates biological age for individual organs

The key differentiator between tests is how many CpG sites they measure. More sites means more data for algorithms to work with, which translates to more accurate and more detailed reports. A test analysing 900,000+ markers can run dozens of different algorithms simultaneously. A test analysing 13 markers can run one basic clock.

Quick Comparison: Best Biological Age Tests UK 2026

1. TruAge COMPLETE by TruDiagnostic - Best Biological Age Test Overall

Rating: 5/5 | Price: £380 at Lola Health | Method: DNA methylation (900,000+ CpG sites)

TruAge COMPLETE by TruDiagnostic is the most full biological age test available to consumers anywhere in the world. It uses the Illumina Infinium MethylationEPIC BeadChip, the same research-grade microarray used in major ageing studies, to analyse over 900,000 CpG sites across your genome. That's not a typo. While some competitors measure 13 or 353 sites, TruAge COMPLETE measures nearly a million.

This extraordinary depth of data is what sets TruAge apart from every other test on this list. With 900,000+ data points, TruDiagnostic can run multiple epigenetic clocks and proprietary algorithms simultaneously, giving you a far richer picture of how your body is ageing.

What You Get in the TruAge COMPLETE Report

• Intrinsic biological age - Your core epigenetic age, independent of blood cell composition
• Extrinsic biological age - Epigenetic age factoring in immune system changes
• DunedinPACE (Pace of Ageing) - How fast you're currently ageing, measured in biological years per chronological year. A score of 1.0 means you're ageing at the expected rate. Below 1.0 means you're ageing slower than average. This is arguably the most actionable metric because it reflects your current rate of ageing, not a cumulative estimate
• SYMPHONYAge (11 organ ages) - Individual biological age estimates for your heart, liver, kidneys, lungs, brain, immune system, metabolic system, musculoskeletal system, hormone system, inflammatory system, and blood system. This allows you to identify which specific organs or systems are ageing faster and target interventions accordingly
• OMICmAge - A third-generation ageing algorithm that integrates proteomic, metabolomic, and clinical data with epigenetics for improved mortality and morbidity prediction
• Telomere length estimation - Derived from methylation data, correlated with cellular ageing
• Disease risk scores - Epigenetic risk estimates for age-related conditions
• Immune cell composition - Deconvolution analysis showing immune cell type proportions
• Smoking and alcohol exposure signatures - Epigenetic evidence of environmental exposures

Collection and Results

The test uses an at-home finger prick blood collection kit. The kit arrives with clear instructions, lancets, and a collection card. You collect your sample, post it back in the prepaid packaging, and receive your results in 2-3 weeks via TruDiagnostic's online portal.

The portal itself is well-designed, presenting complex data in an accessible format with explanations of what each metric means and how it compares to population averages for your age and sex.

Why TruAge Is Considered the Gold Standard

TruDiagnostic has processed over 100,000 samples and built the world's largest proprietary epigenetic database. Their data underpins research papers at leading universities and their algorithms are continuously refined. The Illumina EPIC chip they use is the gold standard in methylation research - it is the same platform used by the Horvath lab, the Dunedin study team, and virtually every major epigenetic ageing research group.

No other consumer test offers the combination of chip coverage (900,000+ sites), algorithm breadth (multiple clocks plus organ-specific ageing plus pace of ageing), and research validation that TruAge COMPLETE delivers.

UK Availability and Price

Lola Health offers TruAge COMPLETE for £380 - the best price available for UK buyers. The kit ships directly to your UK address, and sample return postage is included. This is significantly cheaper than ordering directly from TruDiagnostic in the US ($499, plus international shipping and potential customs charges).

Pros

• Most detailed consumer biological age test available (900,000+ CpG sites)
• Multiple algorithms: DunedinPACE, SYMPHONYAge, OMICmAge, telomere length, disease risk
• 11 organ-specific age estimates - no other consumer test offers this
• Research-grade Illumina EPIC chip - same platform used in academic studies
• Simple at-home finger prick collection
• Fast results (2-3 weeks)
• Best UK price through Lola Health (£380)
• Backed by TruDiagnostic's 100,000+ sample database

Cons

• Higher price point than basic tests (though far more thorough)
• No included consultation (though results are detailed and well-explained in the portal)

Our Recommendation: TruAge COMPLETE is the clear choice for anyone serious about understanding their biological age. It's the most data-rich, scientifically validated, and actionable test you can buy. Buy TruAge COMPLETE from Lola Health for £380 →

2. GlycanAge - Best for Immune System Focus

Rating: 3.5/5 | Price: ~£285 (single test) | Method: IgG glycan analysis

GlycanAge takes a fundamentally different approach to biological age testing. Instead of DNA methylation, it measures IgG glycans - sugar molecules attached to immunoglobulin G antibodies. The composition of these glycans changes with age and inflammation, providing a window into your immune system's biological age. The test was developed by Professor Gordan Lauc at Genos, a Croatian glycobiology laboratory with over 15 years of research in the field.

What You Get

• A single biological age number based on your IgG glycan profile
• Comparison to population averages
• Indication of chronic inflammation status
• Subscription options for tracking changes over time

Limitations

The fundamental limitation of GlycanAge is that it measures only one type of biomarker. Glycans reflect immune system and inflammatory ageing, but they cannot tell you about epigenetic ageing, organ-specific ageing, pace of ageing, telomere length, or disease risk. Think of it this way: GlycanAge gives you one chapter of the story. TruAge COMPLETE gives you the entire book. Glycan analysis is also more susceptible to short-term fluctuations (illness, infection, temporary inflammation) than DNA methylation.

Pros

• Unique methodology offering a different perspective on ageing
• Good for tracking immune system and inflammation changes
• At-home finger prick collection
• Subscription model available for longitudinal tracking
• Responsive to lifestyle interventions (good for short-term feedback)

Cons

• Measures only one biomarker type (IgG glycans) - limited scope
• No organ-specific ageing, no pace of ageing, no disease risk scores
• More susceptible to short-term fluctuations than methylation-based tests
• Slower results (3-5 weeks)
• Not directly comparable with the broader epigenetic clock literature

3. StrideBioage - Membership-Based Biological Age Testing

Rating: 3/5 | Price: ~£699/year membership | Method: DNA methylation

StrideBioage is a UK-based company offering DNA methylation-based biological age testing through an annual membership model. The membership includes periodic retesting and platform access, which appeals to some buyers - though the annual commitment and higher price point are barriers for others.

What You Get

• DNA methylation-based biological age estimate
• Pace of ageing metric
• Access to their member platform
• Periodic retesting within the membership

Limitations

The most significant drawback is the price. At approximately £699 per year, StrideBioage costs nearly twice as much as TruAge COMPLETE - and the publicly available information about their chip coverage and specific algorithms is less transparent than TruDiagnostic's. The requirement for a venous blood draw with a phlebotomist also adds friction compared to at-home finger prick tests.

Pros

• Uses DNA methylation - a scientifically validated methodology
• Membership includes retesting for tracking progress
• UK-based company
• Professional blood draw ensures high sample quality

Cons

• Expensive annual commitment (~£699/year)
• Membership model - you cannot buy a single test
• Requires venous blood draw (less convenient than finger prick)
• Less transparency about exact chip coverage and algorithms compared to TruDiagnostic

4. epiAge by Life Extension Europe - Budget Option with Limited Depth

Rating: 2.5/5 | Price: ~£170 (EUR 199) | Method: DNA methylation via NGS (13 CpG sites)

epiAge, offered through Life Extension Europe, is one of the most affordable biological age tests available. It uses Next-Generation Sequencing (NGS) to analyse DNA methylation - but at only 13 CpG sites. To put that in perspective, TruAge COMPLETE analyses over 900,000 sites. That's a difference of roughly 69,000x in data resolution.

The test uses a saliva sample rather than blood, which makes collection extremely simple. You spit into a tube, post it back, and receive results in 4-6 weeks.

What You Get

• A single biological age estimate
• Comparison to chronological age

Limitations

With only 13 CpG sites, epiAge simply cannot provide the depth of insight that array-based tests offer. There is no pace of ageing measurement, no organ-specific ageing, no disease risk, no telomere estimation, and no multi-clock analysis. The very small number of markers also raises questions about precision - with so few data points, individual measurement errors have a larger impact on the final result.

Additionally, saliva-based samples inherently contain a mix of cell types (epithelial cells, white blood cells, bacteria) which can introduce noise into methylation measurements compared to blood-based tests where cell type composition is better characterised.

Pros

• Most affordable option (~£170)
• Easy saliva collection - no needles required
• Good entry point for those curious about biological age on a budget

Cons

• Only 13 CpG sites - extremely limited compared to array-based tests
• Single biological age number with no additional metrics
• Saliva sample may be less precise than blood-based methods
• Longer results time (4-6 weeks)
• Limited actionability - hard to know what to change with so little data
• Ships from Europe (EUR pricing, potential delays)

5. myDNAge - Single Clock Simplicity

Rating: 3/5 | Price: ~£240 ($299 + shipping) | Method: DNA methylation (Horvath Clock)

myDNAge is a US-based service using the original Horvath Clock (2013) to estimate biological age from 353 CpG sites - more than epiAge's 13 but far fewer than TruAge's 900,000+. One unique feature is that it accepts both blood and urine samples, as the Horvath Clock was designed as a multi-tissue clock.

What You Get

• Biological age based on the Horvath multi-tissue epigenetic clock
• Comparison to chronological age
• Choice of blood or urine sample

Limitations

myDNAge uses only the original Horvath Clock - a first-generation algorithm from 2013. The field has advanced considerably since then, with second-generation clocks (PhenoAge, GrimAge) and third-generation tools (DunedinPACE, OMICmAge) offering better mortality prediction and intervention sensitivity. For UK buyers, international shipping adds cost and customs delays are possible.

Pros

• Uses the well-established Horvath Clock with 353 CpG sites
• Urine sample option - completely non-invasive
• Straightforward single-number result

Cons

• Only one epigenetic clock (Horvath) - first-generation, published in 2013
• No pace of ageing, organ ages, disease risk, or telomere length
• Ships from the US - additional shipping costs and potential customs charges for UK buyers
• Longer turnaround (4-6 weeks, plus international shipping time)
• USD pricing subject to exchange rate fluctuation

6. Paar London Epigenetic Test - Premium Price, Consultation Included

Rating: 3/5 | Price: £690 (excl. VAT) | Method: Blood-based epigenetic testing with consultation

Paar London is a premium longevity clinic in London offering epigenetic biological age testing with an included one-on-one consultation. The consultation is the primary differentiator: a practitioner explains your results and recommends specific lifestyle, supplement, or treatment interventions.

What You Get

• Blood-based biological age test
• Professional consultation to review and interpret results
• Personalised recommendations and action plan

Limitations

At £690 excluding VAT (approximately £828 including VAT), Paar London costs more than double TruAge COMPLETE from Lola Health. The underlying test methodology is less transparent - Paar doesn't publicly disclose the specific chip or number of CpG sites analysed. You're paying a significant premium for the consultation, and many TruAge COMPLETE users find the online portal's explanations sufficient for independent interpretation.

Pros

• Includes professional consultation, helpful for those new to biological age testing
• London-based, convenient for in-person appointments
• Personalised action plan tailored to your results

Cons

• Very expensive - £690 excl. VAT (£828 incl. VAT)
• Limited transparency about test methodology (chip, CpG sites, algorithms)
• Requires a clinic visit (London-based, less accessible for people outside London)
• Consultation adds cost but not necessarily more data

How to Choose the Best Biological Age Test

With six options on the table, here's a framework for deciding which test is right for you.

If You Want the Most wide-ranging Data

Choose TruAge COMPLETE. Nothing else comes close in terms of the number of markers analysed (900,000+), the range of algorithms applied (DunedinPACE, SYMPHONYAge, OMICmAge, and more), or the actionability of the results. At £380 through Lola Health, it's also better value than several less complete alternatives.

If You're on a Tight Budget

Consider epiAge at ~£170. Just understand that with only 13 CpG sites, you're getting a very rough estimate. It may be worth saving a bit longer and investing in TruAge COMPLETE for genuinely actionable data.

If You Want a Different Perspective (Not DNA Methylation)

Try GlycanAge. It won't replace an epigenetic test, but it offers complementary information about immune system ageing. Consider it as an addition to, not a replacement for, a DNA methylation test.

If You Want Someone to Walk You Through Results

Consider Paar London if you're London-based and willing to pay the premium for an included consultation. Alternatively, take TruAge COMPLETE and book a separate longevity consultation - you'll likely spend less total and have better underlying data.

If You Want Ongoing Monitoring Built In

Look at StrideBioage's membership model. But compare the total cost carefully: two TruAge COMPLETE tests through Lola Health (£760) still costs less than one year of StrideBioage (~£699) and gives you significantly more data per test.

If You Want a Non-Invasive Sample

myDNAge offers a urine sample option, and epiAge uses saliva. Be aware that non-blood sample types may sacrifice some precision in methylation measurement.

What to Do After Getting Your Biological Age Results

Knowing your biological age is only valuable if you act on the information. Here's how to turn results into action.

If your biological age is lower than your chronological age, whatever you're doing is working. Use organ-specific data (available in TruAge COMPLETE's SYMPHONYAge report) to identify any systems that may still need attention, even if your overall age is favourable.

If your biological age is higher than your chronological age, don't panic. Epigenetic age is modifiable. The most evidence-backed interventions include:

• Regular exercise - Both cardiovascular and resistance training have been shown to lower epigenetic age
• Sleep optimisation - Poor sleep is consistently associated with accelerated biological ageing
• Nutrition - Mediterranean and anti-inflammatory diets show the strongest associations with slower ageing
• Stress management - Chronic psychological stress accelerates epigenetic ageing
• Supplementation - NMN, resveratrol, and other longevity-focused supplements are being studied for their effects on epigenetic age. Explore longevity supplements at Lola Health
• Reducing toxin exposure - Smoking, excessive alcohol, and environmental pollutants all accelerate epigenetic ageing

Pay particular attention to your DunedinPACE score if you take TruAge COMPLETE. A score above 1.0 means your body is currently ageing faster than the calendar. Because DunedinPACE reflects your present rate of ageing, it's the most responsive metric to lifestyle changes - making it ideal for tracking whether your interventions are working.

Most longevity practitioners recommend retesting every 6-12 months to track the impact of changes. A single test gives you a snapshot. Longitudinal testing gives you a trajectory.

Frequently Asked Questions About Biological Age Tests

What is the most accurate biological age test?

The most accurate biological age tests use DNA methylation analysis on array-based platforms. TruAge COMPLETE by TruDiagnostic, which analyses over 900,000 CpG sites on the Illumina EPIC chip, is widely regarded as the most full and accurate consumer biological age test available. Its use of multiple algorithms (DunedinPACE, SYMPHONYAge, OMICmAge) provides greater accuracy than tests relying on a single clock.

How much does a biological age test cost in the UK?

Biological age tests available in the UK range from approximately £170 (epiAge) to £699+ (StrideBioage membership or Paar London). TruAge COMPLETE, the most detailed option, costs £380 through Lola Health - offering the best balance of depth and value.

Is biological age testing worth it?

If you are invested in longevity, health optimisation, or simply curious about how well you're ageing, a thorough biological age test provides data you cannot get from standard blood tests, wearables, or genetic tests. The key is choosing a test with enough depth to be actionable. A test measuring 13 markers gives you limited insight. A test measuring 900,000+ markers and running multiple ageing algorithms gives you a detailed, actionable roadmap.

What is DunedinPACE?

DunedinPACE (Pace of Ageing Computed from the Epigenome) measures how fast you are currently ageing, expressed as biological years per chronological year. A DunedinPACE of 0.85 means you are ageing at 85% of the normal rate - effectively gaining only 0.85 years of biological age for every calendar year. It was developed using data from the Dunedin Longitudinal Study and is available in TruAge COMPLETE reports.

Can you reverse your biological age?

Yes. Multiple studies have demonstrated reductions in epigenetic biological age through lifestyle interventions including diet changes, exercise, sleep improvement, stress reduction, and supplementation. The degree of reversibility varies between individuals, but the scientific consensus is that biological age is modifiable. Testing and retesting is the only way to measure whether your specific interventions are working.

What is the difference between biological age and chronological age?

Chronological age is simply the number of years since your birth. Biological age reflects the actual condition of your cells, tissues, and organ systems. Two 45-year-olds can have biological ages of 38 and 52 respectively, depending on genetics, lifestyle, diet, stress, sleep, and environmental factors. Biological age is a stronger predictor of healthspan, disease risk, and mortality than chronological age.

How often should I test my biological age?

Most longevity researchers and practitioners recommend testing every 6-12 months. This gives your body enough time to respond to any lifestyle changes or interventions you've implemented. Testing more frequently than every 6 months is unlikely to show meaningful changes, as epigenetic modifications take time to accumulate.

What is the best biological age test in the UK?

TruAge COMPLETE by TruDiagnostic is the best biological age test available to UK buyers in 2026. It offers the most CpG site coverage (900,000+), the most algorithms (including DunedinPACE, SYMPHONYAge, and OMICmAge), and the most wide-ranging reporting. It is available through Lola Health for £380, which is the best UK price.