Best Biological Age Tests: Start With Your Goal
A useful shortlist begins with the question you want to answer, not a universal winner.
AI-assisted editorial draft · Source check: 6 September 2026 · Independent reviewer: not yet assigned
Define the question before the purchase
Do you want to explore a published blood-based model, inspect DNA methylation, or follow everyday wearable trends? Write down the result you want and what you would do differently after receiving it. If that is unclear, buying another score may add little useful information.
Make a method-based shortlist
For published routine-blood calculations, learn about PhenoAge. For methylation-based measurement, check the exact clocks included. For ongoing device trends, read the wearable methodology. These options answer different questions.
Source 1: Aging / Levine et al.Source 2: Genome Biology / HorvathSource 3: WHOOPCheck the practical constraints
Ask about the full cost, sample requirements, local availability, raw-data access and retesting. Our initial profiles remain drafts, so they are examples to investigate rather than verified purchase recommendations. An evidence grade describes a method, not a guarantee of better health.
Sources & verification
- An epigenetic biomarker of aging for lifespan and healthspan (2018)
Aging / Levine et al. · Accessed 2026-09-06
- DNA methylation age of human tissues and cell types (2013)
Genome Biology / Horvath · Accessed 2026-09-06
- How Healthspan on WHOOP works
WHOOP · Accessed 2026-09-06