Longest-running platform (founded 2009); combines blood biomarkers + DNA + wearable data for a holistic health picture; fastest results in category (3-5 days); strong athletic/fitness community
Only major player using glycan biomarkers instead of DNA methylation; faster response to interventions than epigenetic clocks; includes physician consultation in every package
Highest-resolution consumer epigenetic test on the market (950k CpGs); exclusive DunedinPACE licensing; multi-generation clock approach validated with Harvard and Yale researchers
Only player combining gut microbiome, oral microbiome, and cellular health with biological age in a single test; metatranscriptomic technology is unique in the DTC space
Most granular organ-system view (19 systems); founded by UC Berkeley aging pioneer Dr. Irina Conboy; strong B2B clinic channel (275+ partners); documented 5.5-13.6 year age reductions in case studies
Best price-to-depth ratio in the blood-based epigenetic category; Public Benefit Corporation ethos; free AI-based age tool as entry point; strong supplement ecosystem (NOVOS Core / Boost)
Biological-age tests promise to replace your chronological age with a number that tracks how your body is actually aging — and how interventions are moving it. The category is now mature enough to ship real consumer products: TruDiagnostic, Elysium Index, Generation Lab, GlycanAge, MyDNAge, and Tally Health all bundle epigenetic methylation analysis (or glycan / multi-omic analogs) into a $200–$800 retail kit. What’s still messy is methodology: which clock, how many CpGs, what reference cohort, what reproducibility. A single number on a dashboard can hide enormous methodological variance.
What We Compare
Every test in our comparison is evaluated on:
Clock methodology — first-generation (Horvath, Hannum), second-generation (PhenoAge, GrimAge), or third-generation pace-of-aging clocks (DunedinPACE). We surface which the test uses and what each is validated for.
CpG resolution — number of methylation sites analyzed. TruDiagnostic’s ~950k CpG array is the highest-resolution consumer offering; smaller targeted arrays are cheaper but more sensitive to noise.
Test-retest reproducibility — how stable is the result on the same blood drawn twice? TruDiagnostic publishes 99% reproducibility on its multi-clock; competitors vary.
Sample collection — phlebotomist blood draw vs at-home fingerstick vs cheek swab. Saliva-based clocks are convenient but methodologically weaker.
Longitudinal cost — biological age is meaningful as a trend, not a single point. We model 3-year cost for quarterly or semi-annual testing per provider.
Reporting depth — single number, organ-system breakdown, or interpretation framework. Some tests are dashboards; others are PDFs.
Key Findings (2026)
TruDiagnostic’s TruAge has the strongest published methodology. ~950,000 CpG sites, multi-clock approach (OMICmAge, SYMPHONYAge, exclusive DunedinPACE licensing), published with Harvard and Yale researchers. 99% test-retest reproducibility is best-in-class. Pricing reflects this — $399 per test at the entry tier.
GlycanAge measures something different. Glycan analysis indexes immune-system aging via IgG glycosylation patterns, not DNA methylation. It complements rather than competes with epigenetic clocks; both have a place if you can afford parallel testing.
Saliva-based tests (MyDNAge, Tally Health) are convenient but lower resolution. Cheaper and easier to ship, but published methylation-clock validation is stronger from blood than saliva. Acceptable for trend tracking; less reliable for single-point decisions.
No consumer biological-age test is FDA-cleared. The FDA does not approve “biological age” as a clinical claim; tests ship as wellness products. This means lab quality (CLIA-certified processing) matters more than FDA status — confirm the partner lab.
A single biological-age number is the wrong takeaway. The methodologically defensible signal is change over time on the same clock — not a one-shot age vs chronological. Plan for at least three measurements (baseline, 6-month, 12-month) before concluding anything about an intervention.
Who Should Read This
Longevity-focused readers comparing epigenetic test providers
Anyone tracking the impact of interventions (sleep, exercise, supplements, peptides) on aging biomarkers
Buyers deciding between TruDiagnostic vs Elysium Index vs GlycanAge
People who want to understand why “biological age” is a real signal but a slippery one