Topic directory
Biological Age
An estimate of how old the body appears physiologically, based on biological markers, as distinct from chronological age based simply on birth date.
| Focus | Composite healthspan measure |
|---|---|
| What It Tracks | Physiological markers (commonly epigenetic, blood-based, or functional) combined into a single age estimate |
| Why It Matters | Used as a summary indicator of overall aging trajectory rather than any single biomarker in isolation |
| Typical Setting | Commercial testing services and, increasingly, research-grade epigenetic clock panels |
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Article
What Is Biological Age?
Biological age measures how old your body is functionally, not how long you have been alive. Here is how it is measured and why it matters more than your birth year.
Glossary TermBiological Age
An estimate of how old the body is functionally, based on objective biological measurements, as opposed to chronological age, which simply counts years since birth.
FAQLongevity Science FAQ
Answers to the most common questions about longevity science, healthspan, biological aging, and evidence-based interventions.