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.
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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.
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Fundamentals8 min
The hallmarks of aging
The 14 biological processes that drive aging — and a framework for understanding what biological age tests actually measure.
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Clock Science7 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.
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Clock Science10 min
Why aging clocks disagree
Some clocks estimate how old your biology looks. Others predict health outcomes. Others measure how fast you are aging right now. Here is how to tell them apart — and which type is useful for what.
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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.
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Interventions9 min
Exercise and biological age: what the evidence shows
How physical activity affects epigenetic clocks, inflammatory markers, and phenotypic aging scores. A balanced look at what the science supports — and where the gaps remain.
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Testing Strategy6 min
How often should you test your biological age?
The answer is more nuanced than most marketing suggests. Evidence-based guidance on testing intervals, measurement precision, and why consistency matters more than frequency.
Read article →Functional Ageing7 min
Digital biomarkers of ageing
What AI-based, visual, and wearable aging proxies can tell you — and where their limits are. How non-molecular methods compare to established epigenetic and glycomic clocks.
Read article →Clock Science8 min
Biological age from routine blood work
A 2025 Nature Medicine study trained an AI model on 9.7 million patients' clinical records and found meaningful aging signal in the markers already in your annual blood panel. What the research shows — and what it does not yet justify.
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