Biological Age Testing Kits Compared: The 2026 Longevity Tracker Guide
Six of the most-used biological age tests, benchmarked against the same criteria: which clocks they run, peer-reviewed validation, price, turnaround, and how actionable the report actually is. Grounded in the epigenetic-aging literature and cross-referenced with the clinical trials we track inside LongevityHub Pro.
What a longevity tracker actually measures
A "longevity tracker" is any tool that estimates biological age — how old your body appears at the molecular level — as distinct from your chronological age. The gap between the two, called age acceleration, is what researchers have shown to predict all-cause mortality, cardiovascular events, and cancer risk more accurately than birth date alone.
The consumer market clusters around three technologies: DNA-methylation-based epigenetic clocks, multi-analyte blood biomarker panels, and telomere-length assays. Each answers a different question, and the best tracker for you depends on whether you want a stable long-run signal or a fast-responding feedback loop.
The three main methods
Epigenetic clocks
Measure DNA methylation at hundreds to thousands of CpG sites and feed them into a trained model. Third-generation clocks (GrimAge, PhenoAge, DunedinPACE) are validated against mortality and disease outcomes.
Blood biomarker panels
Combine ~10–20 clinical labs (CRP, HbA1c, GlycA, ferritin, etc.) into a composite age score. Less validated than DNAm clocks, but responsive to lifestyle change within weeks.
Telomere length
Measures the protective caps on chromosomes. Historically popular but only weakly correlated with mortality vs epigenetic clocks. Useful as a supplementary signal.
Side-by-side comparison
All prices in USD, as listed by the vendor at time of writing. "Peer-reviewed" means the underlying clock or algorithm has been published in a peer-reviewed journal.
| Kit | Method | Clocks / markers | Price | Turnaround | Peer-reviewed | Actionable |
|---|---|---|---|---|---|---|
TruDiagnostic TruAge COMPLETE TruDiagnostic | DNA methylation (EPIC array) | GrimAge 2, PhenoAge, DunedinPACE, OMICmAge | $229–$499 | 3–5 weeks | ||
Elysium Index Elysium Health | DNA methylation (custom panel) | Proprietary (Horvath-derived) | $299 | 4–6 weeks | ||
myDNAge Epimorphy / Zymo | Targeted bisulfite sequencing | Horvath 2013 | $299 | 6–8 weeks | ||
GlycanAge GlycanAge | IgG glycan profiling | Glycan-based inflammatory age | $298 | 3–4 weeks | ||
InsideTracker InnerAge 2.0 InsideTracker | Blood biomarker panel (algorithmic) | Composite of ~18 biomarkers | $249–$589 | 5–7 days | ||
Life Length Telomere Analysis Life Length | HT Q-FISH telomere length | Telomere length distribution | $500+ | 4–6 weeks |
Most comprehensive clock panel; DunedinPACE is the best-validated pace-of-aging marker.
Consumer-friendly UX, but narrower marker set and less transparent methodology.
Runs the original Horvath clock — useful for research replication, less useful for tracking change.
Reflects inflammatory/immune aging; responsive to lifestyle within 3–6 months.
Fastest turnaround and clearest recommendations; not an epigenetic clock, but tracks intervenable markers.
Telomere length correlates weakly with mortality vs epigenetic clocks. Best used alongside DNAm.
What the evidence says
Across large cohorts (Framingham, Health and Retirement Study, Understanding Society), DunedinPACE and GrimAge 2 consistently rank as the strongest individual predictors of mortality among currently available methylation clocks — outperforming first-generation clocks (Horvath 2013, Hannum) by 20–40% in hazard ratio magnitude.
PhenoAge sits between the two, and remains the cheapest clock to run given its smaller CpG requirement. Telomere length, by contrast, shows hazard ratios closer to 1.05 per SD — statistically detectable in large samples, rarely meaningful at the individual level.
Blood biomarker composites (InsideTracker InnerAge, Levine's PhenoAge blood formula) trade validation depth for responsiveness: they move within 8–12 weeks of an intervention, whereas DunedinPACE typically requires 6–12 months to shift measurably. That makes them complementary, not redundant.
LongevityHub Pro tracks clinical trials testing rapamycin, metformin, and senolytics against these exact endpoints, and indexes new research on clock validation as it appears — including the ongoing debate over whether epigenetic age is truly causal or a downstream marker of upstream biology.
How to choose a longevity tracker
Frequently asked questions
What is the best longevity tracker in 2026?
For most users, TruDiagnostic TruAge COMPLETE offers the strongest evidence base because it reports DunedinPACE, GrimAge 2, and PhenoAge — the three epigenetic clocks with the most peer-reviewed mortality and morbidity validation. For faster, more actionable feedback, blood-biomarker panels like InsideTracker are complementary rather than competitive.
How accurate are epigenetic clocks?
Second- and third-generation clocks (GrimAge, PhenoAge, DunedinPACE) predict all-cause mortality with hazard ratios of 1.1–1.5 per standard deviation in large cohorts. Test–retest reliability at the individual level is more modest (ICC ~0.6–0.9), so single-timepoint scores should be interpreted as a range, not a point estimate.
How often should I retest?
Every 6–12 months is a reasonable cadence for tracking intervention response. Retesting more often typically produces noise that exceeds real biological change, especially for slower clocks like GrimAge.
Are these tests FDA approved?
No consumer biological-age test is FDA approved as a diagnostic. Most operate as CLIA-certified laboratory-developed tests for informational and wellness use.
Epigenetic clock vs blood biomarker panel — which should I choose?
They answer different questions. Epigenetic clocks estimate long-run biological aging trajectory. Blood biomarker panels reflect current physiological state and respond to short-term lifestyle changes. Serious longevity trackers use both.
Track the science, not just your score
LongevityHub Pro indexes every clinical trial, funding round, and peer-reviewed study behind the tests above. See what's working — and what's not — before the next headline.
Start free trialThis guide is for informational purposes only and is not medical advice. Biological age tests are not FDA-approved diagnostics. Consult a qualified clinician before making health decisions based on any tracker output.