Biological age testing estimates how your body is aging compared with your chronological age. The most reliable options today combine epigenetic clocks from blood or saliva with standard blood biomarkers.
Why It Matters
Knowing your biological age helps prioritize interventions that may slow aging processes, such as strength training, sleep optimization, and targeted nutrition. It also provides a baseline to track changes from lifestyle or medical interventions over time.
How to Choose a Biological Age Test
- Decide between at-home saliva or blood-spot tests versus a full laboratory blood panel.
- Compare the number of CpG sites analyzed and the peer-reviewed validation behind the clock algorithm.
- Check whether results include actionable recommendations and follow-up testing intervals.
- Verify privacy policies for genetic data storage and sharing.
Biological Age Test Comparison
| Test | Sample Type | Key Metric | Evidence Level | Best For |
|---|---|---|---|---|
| TruDiagnostic | Blood | DunedinPACE & GrimAge | Multiple human validation studies | Detailed longitudinal tracking |
| InsideTracker | Blood | InnerAge 2.0 | Algorithm based on population data | Biomarker-focused users |
| Elysium Index | Saliva | DunedinPACE | Published human cohorts | Convenience and repeat testing |
| Function Health | Blood | Composite score | Standard lab ranges plus age-adjusted | Comprehensive baseline panels |
FAQ
How accurate are biological age tests?
Most commercial clocks show moderate correlation with health outcomes in population studies, but individual results can vary by lab and lifestyle factors.
Do I need a doctor to order these tests?
Some companies sell direct-to-consumer; others require a clinician order. Full diagnostic panels are usually ordered through a licensed provider.
How often should I retest?
Most experts suggest retesting every 6–12 months to detect meaningful changes after consistent lifestyle adjustments.
Last updated: September 10, 2026