Epigenetic age testing,interpreted honestly.

Epigenetic clocks estimate your biological age from DNA methylation, the chemical marks on your DNA that shift with age and with lifestyle factors. The algorithm compares your methylation pattern across hundreds to hundreds of thousands of sites against reference data and derives an age value from it. Well-known models include the Horvath clock, PhenoAge, GrimAge and DunedinPACE, the last of which estimates a pace of ageing rather than an age. An important caveat: these are statistical models trained on cohort data. They say something quite reliable about groups and considerably less reliable about an individual. We therefore treat them as a supplementary research parameter, not a diagnosis.

As a clinical diagnostic, no, and we say so plainly. No medical guideline currently recommends epigenetic clocks as a basis for individual treatment decisions. The association between accelerated epigenetic ageing and later disease is well established at population level; the prognostic value for a single person is not. There is also a practical problem: test-retest reliability of first-generation clocks was weak, with the same sample deviating by several years across two measurements. Newer principal-component-based variants have improved this substantially. For us that means: interesting as a trend across years, unusable as a single value on which to base a decision.

Direct-to-consumer tests typically cost 200 to 400 euros, usually work from a saliva sample and hand you a number in a PDF. That is not technically wrong, but it omits the part that makes the number usable. At YEARS, epigenetics is determined from a blood sample within the Ultimate program and interpreted by a physician alongside more than 230 biomarkers, whole-body MRI, liquid biopsy, microbiome analysis and functional diagnostics. An accelerated epigenetic age then becomes a question we can follow up, rather than a number you have to interpret yourself. If the number alone is what you want, a DTC test is the cheaper choice.

The models do not measure the same thing, which explains many contradictory results. First-generation clocks such as the Horvath clock were trained to predict chronological age, so they mainly tell you how well your methylation reflects your date of birth. Second-generation clocks such as PhenoAge and GrimAge were trained on clinical markers and mortality, which gives them more health relevance. DunedinPACE estimates not an age but your rate of ageing, which is the more useful quantity for tracking change. Which clock was used therefore belongs in any serious results discussion. We disclose it and do not interpret across model boundaries.

Treat this question carefully, because it is often posed wrongly. What is established is that lifestyle factors correlate with epigenetic age: smoking, alcohol, insufficient sleep, obesity and low physical activity all track with accelerated epigenetic ageing. Some smaller intervention studies show shifts in the measured value after lifestyle change. What does not follow is that a lowered number equals years of life gained. The measurement is a surrogate, not an endpoint. Anyone selling a compound that turns back the epigenetic clock is selling a claim for which there is no robust efficacy data on hard endpoints.

It is useful if you are undergoing comprehensive diagnostics anyway and want to track epigenetics as an additional layer across several years, or if you are scientifically interested and understand the difference between a research parameter and a diagnosis. It is less useful if you expect a dependable statement about your personal disease risk, because lipid profile, blood pressure, HbA1c, Lp(a) and imaging are far better evidenced for that and usually much cheaper. If your budget is limited, we explicitly recommend doing the established diagnostics first. Epigenetics is an addition, not a replacement.

We do not sell it as a standalone service. Epigenetic analysis is part of YEARS Ultimate from 16,900 euros, the most comprehensive program, with more than 230 biomarkers, whole-body MRI, liquid biopsy, microbiome analysis, neurological diagnostics and a dedicated health manager across the year. That is a deliberate decision: an epigenetic number without the diagnostic context beside it is not, in our view, a service worth selling. If an epigenetic age value is genuinely all you want, a direct-to-consumer test at 200 to 400 euros is the right route, and we would rather tell you that beforehand than afterwards.