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 | ~$399 | 3–4 weeks | Immune system biological age | 8.3/10 |
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.
Top Picks
1. InsideTracker — Best Overall
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
2. TruDiagnostic (TruAge) — Best Epigenetic Test
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
3. Function Health — Most Comprehensive
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
4. Elysium Index — Best DNA-Based Budget Option
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
5. Glycanage — Best for Immune Aging
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
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.
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.