Biological Age Wearables Guide
Compare Garmin Fitness Age, Apple Watch Cardio Fitness, Oura Readiness, WHOOP Healthspan and Fitbit metrics as exact product ecosystems.
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Biological Age Tests
At-Home Longevity Test Guide
Compare exact at-home longevity testing products by what they measure, how results are interpreted and what the evidence cannot prove.
Read articleBiological Age Test Shopping Guide
Compare TruAge, Elysium Index, GlycanAge and InnerAge2.0 by sample, method and the kind of age report returned.
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Can Biological Age Tests Track an Intervention?
Some trials detect average changes in biological-age clocks. Two consumer results cannot yet reliably show that an intervention slowed one person's aging.
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Blood-Based vs. Epigenetic Age Tests
Clinical blood-age tests combine routine lab values; epigenetic clocks analyze chemical patterns on DNA. Neither forecasts one person's lifespan.
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What To Do With a Biological Age Result
Biological-age scores are research estimates, not diagnoses or lifespan forecasts. Their units, repeatability and limits depend on the clock and sample.
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How Often Should You Test Biological Age?
No guideline sets a biological-age retest interval, and existing trials do not validate a routine schedule for tracking one person.
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Can You Reverse Your Biological Age?
A biological age score has dropped in several small human trials. No trial has shown a lower score means slower aging, less disease or a longer life.
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How Accurate Are Biological Age Tests?
Depends which accuracy. Standard clocks can drift years on one sample; newer ones are tighter and predict mortality in groups. None is a medical test for you.
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Biological Age vs. Chronological Age
Chronological age counts years since birth. Biological age estimates wear and tear from biomarkers. The gap predicts risk in groups, not fate in individuals.
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