Article library · Biomarkers
Biomarkers
7 evidence reviews in this category. Every piece states what the human data shows, how large the effect is, and when to talk to a clinician instead.
HRV and Longevity: What Your Heart Rate Variability Score Actually Tells You
Heart rate variability is one of the most trackable longevity biomarkers available today. A practical guide to HRV ranges, what drives the number, and how to read its trends without over-reading what a wearable score can predict.
Longevity Biomarkers to Track: A Complete Measurement Guide
The most useful biomarkers for measuring your healthspan, how to interpret them, and how often to test — a practical guide to building your longevity tracking panel.
Best Wearable for Longevity in 2026: Oura Ring 4 vs WHOOP 5.0 vs Apple Watch
Not all wearables track what matters for longevity. This guide compares Oura Ring 4, WHOOP 5.0, and Apple Watch on sleep accuracy, HRV measurement, recovery scoring, and long-term health signal quality — so you can choose the right device for your health span.
Biological Age Testing: The Complete Guide to Epigenetic Clocks, At-Home Tests, and What the Results Actually Mean
Your chronological age tells you how many birthdays you've had. Your biological age tells you how fast you're actually aging. Here's how to test it, interpret it, and use the data to make smarter longevity decisions.
Best Longevity Blood Tests to Track in 2026: A Clinically Useful Panel
A short, defensible longevity blood panel: which markers have causal evidence behind them, which are only observational, how often to retest, what confounds each result, and when to stop testing and call a clinician.
Best Longevity Blood Tests to Track Your Health
A high-yield blood test shortlist for longevity planning, with repeat cadence guidance and interpretation principles.
Blood Tests for Longevity: The Core Panel to Request
A clinician-friendly bloodwork checklist to monitor longevity-focused lifestyle and supplement interventions.