Clock Science12 min
How epigenetic clocks work
From Horvath's pan-tissue clock to DunedinPACE: how DNA methylation patterns are used to estimate biological age, and why different clocks give different answers.
Coming soon →Education
Learn about aging clocks
Evidence-based articles that explain the science, separate hype from substance, and help you make informed decisions. No jargon walls.
Fundamentals8 min
What is biological age?
The difference between chronological and biological age, why it matters, and what science actually knows (and doesn't know) about measuring it.
Read article →Clock Science10 min
ChronAge vs PhenoAge vs Pace-of-Aging
Understanding the three paradigms of aging clocks: those trained to predict your calendar age, those trained to predict health outcomes, and those measuring your current rate of aging.
Coming soon →Critical Perspective10 min
The limitations of aging clocks
What a single biological age number hides: organ heterogeneity, cell-mixture confounding, measurement uncertainty, and the gap between vendor claims and evidence.
Coming soon →Practical7 min
What your test results actually mean
You got your biological age result. Now what? How to interpret the number, what it doesn't tell you, and when to talk to a doctor.
Coming soon →Interventions9 min
Exercise and biological age: what the evidence shows
How physical activity affects epigenetic clocks, inflammatory markers, and phenotypic aging scores. The most consistently validated intervention.
Coming soon →Want to start with the basics?
Our Start Here guide walks you through everything step by step.
Start here