InsideTracker is the best biological age test in 2026 because it combines blood biomarkers, lifestyle data, and clear recommendations that help you actually improve your health metrics. TruDiagnostic’s TruAge test is the best epigenetic-based aging test if you want a deep DNA methylation analysis of aging pace. Function Health offers the most comprehensive blood biomarker testing for ongoing longevity monitoring.
Quick Comparison Table
| Test | Method | Price | Turnaround | What It Measures | Our Rating |
|---|---|---|---|---|---|
| InsideTracker | Blood biomarkers + algorithm | ~$149–$589 | 7–14 days | Metabolic, hormonal, inflammation markers | 9.3/10 |
| TruDiagnostic (TruAge) | Epigenetic DNA methylation | ~$349–$499 | 3–4 weeks | Biological aging pace via epigenetic clocks | 9.1/10 |
| Function Health | Comprehensive blood biomarkers | ~$499/year | 1–2 weeks | 100+ biomarkers including longevity markers | 8.9/10 |
| Elysium Index | Epigenetic DNA analysis | ~$299 | 3–4 weeks | DNA methylation biological age estimate | 8.5/10 |
| Glycanage | Glycan analysis of immune aging | $79 + meds | 3–4 weeks | Immune system biological age | 8.3/10 |
| Tally Health | Epigenetic DNA methylation (cheek swab) | ~$249 test / $129/mo | 4–6 weeks | CheekAge biological age | 8.2/10 |
How We Ranked These
The best biological age tests combine scientific credibility, affordability, ease of use, and actionable insights that help users improve long-term health. We evaluated scientific validity, price, ease of use, and actionability of results.
Quick Decision Summary
- Best overall: InsideTracker
- Most precise epigenetic clock: TruDiagnostic (TruAge)
- Most comprehensive biomarkers: Function Health
- Best budget option: Elysium Index
- Best cheek-swab (no blood): Tally Health
Top Picks
1. InsideTracker, Best Overall
Why it ranks #1: Blood biomarker testing combined with biological age scoring and a personalized action plan, the most actionable biological age product available.
InsideTracker ranks best because it focuses on blood biomarker analysis combined with actionable health insights. It evaluates cholesterol, inflammation, glucose regulation, hormones, and micronutrients using an algorithm developed with research from MIT, Harvard, and Tufts. The platform provides personalized recommendations for diet, sleep, exercise, and supplementation, making it genuinely useful for improving your metrics, not just measuring them.
Pros: Strong biomarker science · Personalized lifestyle recommendations · Track progress over time
Cons: Requires blood draw · Higher cost for comprehensive panels
Best for: People who want to actively optimize longevity markers
Who Should Choose InsideTracker
Choose InsideTracker if:
- You want actionable health recommendations alongside your biological age score
- You want blood biomarker testing with the option to retest quarterly
- You are actively trying to optimize your health and track progress over time
Avoid InsideTracker if:
- You want the deepest epigenetic aging analysis without blood biomarkers
- You only want a one-time snapshot without ongoing retesting
- You are purely price-sensitive and want the lowest-cost option
2. TruDiagnostic (TruAge), Best Epigenetic Test
Why it ranks #2: The most scientifically validated epigenetic clock available to consumers, analyzes DNA methylation across multiple aging clocks in one report.
TruAge analyzes DNA methylation patterns to estimate biological aging using multiple validated epigenetic clocks. It measures aging at the cellular level, providing insight into long-term biological processes rather than short-term metabolic markers. Simple saliva sample, mailed to the lab.
Pros: Advanced epigenetic analysis · Non-invasive saliva test · Measures cellular aging
Cons: Results harder to interpret · Fewer actionable lifestyle insights
Best for: Longevity enthusiasts who want cellular-level aging data
Who Should Choose TruDiagnostic (TruAge)
Choose TruDiagnostic (TruAge) if:
- You want the most validated epigenetic biological age clock available
- You want a detailed aging analysis across multiple clock algorithms
- You are serious about precision longevity tracking over time
Avoid TruDiagnostic (TruAge) if:
- You want actionable dietary or lifestyle recommendations with your result
- You want a comprehensive blood biomarker panel alongside your age score
- You are new to biological age testing and want a simpler introduction
3. Function Health, Most Comprehensive
Why it ranks #3: Over 100 biomarkers in a single panel, the most comprehensive lab picture of your health of any service here, going well beyond aging markers.
Function Health tests 100+ biomarkers on a subscription model, making it ideal for tracking changes over time. Covers metabolic health, cardiovascular risk, hormones, inflammation, and nutrient status. Particularly useful for people experimenting with diet, exercise, or supplementation interventions.
Pros: Extremely comprehensive · Great for ongoing tracking · Strong preventative health focus
Cons: Higher annual cost · Requires lab visits
Best for: Serious longevity trackers who test regularly
Who Should Choose Function Health
Choose Function Health if:
- You want 100+ biomarkers in one comprehensive lab panel
- You want ongoing quarterly membership with systematic retesting
- You want health data across multiple body systems simultaneously
Avoid Function Health if:
- You specifically want a biological age score from epigenetic analysis
- You want DNA methylation-based age testing
- You want a lower-cost one-time test without a membership commitment
4. Elysium Index, Best DNA-Based Budget Option
Why it ranks #4: A DNA-based biological age estimate without a blood draw, the most accessible entry point for patients new to biological age testing.
Elysium’s Index test provides an epigenetic biological age estimate via saliva sample. Connected to academic longevity research and NAD+ biology. A credible option for users primarily interested in tracking biological age through DNA-based metrics without the full cost of TruDiagnostic.
Pros: DNA-based estimate · Research-driven brand · Simple at-home test
Cons: Limited actionable guidance
Best for: Budget-conscious longevity trackers
Who Should Choose Elysium Index
Choose Elysium Index if:
- You want a DNA-based biological age estimate without a blood draw requirement
- You want a budget-accessible introduction to biological age testing
- You are curious about your genetic aging baseline before committing to more testing
Avoid Elysium Index if:
- You want the most precise and validated epigenetic clock methodology
- You want actionable health recommendations to act on your results
- You want blood biomarkers included alongside your age score
5. Glycanage. Best for Immune Aging
Why it ranks #5: A unique immune aging assessment through glycan biomarker analysis, offers a scientific lens on biological age that no other consumer test provides.
Glycanage analyzes glycan patterns, sugar molecules on antibodies linked to immune aging and inflammation. Chronic inflammation is strongly linked to age-related diseases, and glycan profiles respond to lifestyle changes, making this useful for tracking health interventions.
Pros: Unique immune-aging measurement · Responsive to lifestyle changes
Cons: Narrower focus · Less widely known
Best for: People focused specifically on inflammation and immune aging
Who Should Choose Glycanage
Choose Glycanage if:
- You want a unique immune aging assessment through glycan biomarker analysis
- You are interested in tracking biological age through a different scientific lens
- You want to specifically assess your immune system’s biological age
Avoid Glycanage if:
- You want comprehensive blood biomarkers alongside your biological age score
- You want epigenetic clock analysis or DNA methylation testing
- You want actionable lifestyle recommendations alongside your biological age result
6. Tally Health, Best Cheek-Swab (No-Blood) Epigenetic Clock
Why it ranks #6: The only clock here that runs on a painless cheek swab rather than blood, and one of the few backed by a named scientist and published DNA-methylation research.
Tally Health’s CheekAge test estimates biological age from DNA-methylation patterns in cells collected with a simple cheek swab, returning results in roughly 4–6 weeks. The company was co-founded by Harvard geneticist Dr. David Sinclair, and its CheekAge clock is described in peer-reviewed work, a published-research pedigree most consumer clocks lack. A one-time TallyAge Test runs $249, or a membership from $129/mo bundles twice-yearly retests, a daily supplement, and a personalized action plan (verified on Tally’s site, 2026-07-17).
Tally states its CheekAge clock was trained on a large adult DNA-methylation dataset and reports that “over 62% of members lowered their epigenetic age by an average of 2+ years within 12 months.” That figure is the company’s own; we could not independently verify it. No biological-age test is a medical diagnosis, read the score as a trend line to track over time, not a clinical result. See Tally Health’s TallyAge test for current details.
Pros: No blood draw, cheek swab only · Named Harvard scientist and published clock · Membership retests track change over time
Cons: Headline efficacy stat is company-reported and unverified · Membership costs more than a one-time competitor test · Newer to our coverage
Best for: People who want a no-blood epigenetic clock with a published-research pedigree
Who Should Choose Tally Health
Choose Tally Health if:
- You want a biological age estimate from a painless cheek swab rather than a blood draw
- You value a clock tied to a named Harvard scientist and published DNA-methylation research
- You want a membership that retests every six months so you can track change over time
Avoid Tally Health if:
- You want blood biomarkers or actionable lab values alongside your age score
- You are put off by an efficacy claim the company reports but has not had independently verified
- You prefer a lower-cost one-time test without a membership option
Epigenetic vs Blood Biomarker Tests, What’s the Difference
Epigenetic tests estimate biological age via DNA methylation patterns. Blood biomarker tests measure physiological indicators like cholesterol, inflammation, and hormones. Epigenetic tests offer insight into long-term aging processes; biomarker tests provide actionable metrics you can improve through lifestyle changes. Many longevity experts recommend combining both.
How Do I Actually Test These Longevity Markers Myself?
A biological-age score tells you how fast you’re aging, but it doesn’t hand you the individual lab markers longevity physicians actually act on, ApoB, hs-CRP, and HbA1c. You can order those yourself, without a doctor’s visit. See where to order them cheapest and how the physician-order-included services compare: Order your own longevity bloodwork →.
Frequently Asked Questions
What is a biological age test?
A biological age test estimates how quickly your body is aging compared to your chronological age, analyzing biomarkers or genetic patterns associated with aging processes.
What is the difference between chronological age and biological age?
Chronological age measures years lived. Biological age reflects the condition of your body based on health markers and cellular aging indicators, you can be 45 chronologically but have the biology of a 38-year-old.
Which biological age test is most accurate?
Epigenetic tests using validated aging clocks are considered highly accurate for estimating biological age, while biomarker tests provide more practical, actionable health insights.
Can biological age be reversed?
Some studies suggest lifestyle changes, improved diet, exercise, sleep, and stress management, may meaningfully improve biological aging markers over time.
How often should you take a biological age test?
Most experts recommend testing every 6–12 months to track changes in biomarkers or epigenetic aging patterns meaningfully.
Are epigenetic clocks widely accepted in science?
Yes. Epigenetic clocks are widely studied in aging research and are considered one of the most promising tools for estimating biological aging pace.
Should biological age tests replace regular medical tests?
No. Biological age tests should complement regular medical checkups and preventative health screenings, not replace them.
Sources
- Horvath S. (2013). DNA methylation age of human tissues and cell types. Genome Biology.
- Levine ME et al. (2018). An epigenetic biomarker of aging for lifespan and healthspan. Aging.
- Jylhävä J et al. (2017). Biological Age Predictors. Clinical Chemistry.
- Belsky DW et al. (2020). Quantification of biological aging in young adults. PNAS.
- Kaeberlein M. (2020). The biology of aging. Nature.
Related Guides
See our How We Rank methodology and Affiliate Disclosure. | See all comparison guides →
RangeYourself is reader-supported. We may earn a commission when you click on certain links, at no extra cost to you. Editorial recommendations are made independently. Last reviewed April 1, 2026.
