Evidence-Based Public Reference

Longevity Science, Explained Clearly

Starlight Longevity is a public reference library on ageing biology, healthspan, biomarkers, interventions, and regenerative science built for careful reading rather than hype.

Starting Points

Begin with the path that matches your question, then move into the section hubs and core pages.

New to longevity science

Begin with a plain-language introduction to what ageing is, why it happens, and how the field is structured.

Best first read: What Is Ageing, Scientifically?

Need to judge evidence quality

Learn how to read studies, weigh causality, and spot where biomarkers or interventions are being overstated.

Best first read: How to Evaluate Longevity Evidence

Interested in biomarkers

Understand what biomarkers can measure, where they fail, and why biological-age scores should be interpreted carefully.

Best first read: What Is a Biomarker of Ageing?

Comparing interventions

Review lifestyle and functional factors through the lens of study design, endpoint selection, and evidence strength.

Best first read: Exercise and Longevity

Library Index

The collection is organized around the main questions people ask when trying to understand ageing research.

Ageing Biology

Mechanisms, hallmarks, evolutionary theories, and the difference between ageing and disease.

Healthspan & Function

Functional ageing, frailty, morbidity compression, and how healthy years are measured.

Biomarkers & Measurement

Molecular, physiological, and functional measures used to estimate biological state and risk.

Interventions & Human Evidence

Exercise, sleep, fitness, and other modifiable factors examined through evidence quality and context.

Regeneration & Repair

Why tissues regenerate unevenly, how repair differs from regeneration, and why capacity declines with age.

Experimental & Translational Approaches

Early-stage biomedical approaches examined through mechanisms, safety, and translational limits.

Research Methods & Evidence

Frameworks for reading abstracts, comparing study types, and interpreting risk and uncertainty.

Key Concepts to Understand First

Ageing is not one process

Biological ageing emerges from interacting molecular, cellular, and systemic changes rather than a single cause.

Healthspan is not lifespan

Living longer and living well for longer are related questions, but they are not interchangeable endpoints.

Biomarkers are not diagnoses

Many longevity-related biomarkers are useful for research or risk stratification but are not clinical verdicts on an individual.

Interventions differ by evidence quality

Some claims come from long-term human data, while others rest mostly on animal studies or indirect markers.

Common Mistakes in Longevity Content

Using the words lifespan and healthspan as if they mean the same thing.
Assuming animal or cell-model findings translate directly to clinical benefit in humans.
Treating biomarker outputs as definitive diagnoses rather than context-dependent measurements.
Ignoring differences in population, baseline health, protocol, and endpoint when comparing studies.
Overreading observational associations as proof that an intervention will work equally for everyone.

How to Read the Field

Different parts of longevity science answer different questions. Comparing them directly without context is one of the most common mistakes readers make.

Area	Main Question	Stronger Evidence Usually Comes From	Common Mistake
Ageing Biology	What mechanisms help explain why organisms age?	Mechanistic studies, comparative biology, and converging experimental evidence	Treating ageing as a single pathway with one master explanation
Biomarkers	How can biological state, function, or risk be measured?	Validation studies, cohort data, replication across populations, and protocol clarity	Assuming one biomarker score fully captures biological age
Interventions	Which changes are linked to better long-term outcomes?	Long-term human studies, randomized trials for intermediate outcomes, and dose-response consistency	Confusing strong associations with proof of universal causation
Research Literacy	How should a claim be interpreted?	Study design comparison, effect size context, and explicit limits on generalization	Reading abstracts or headlines without checking methods or population fit

Recent Updates

The newest additions and revisions are listed here. The full archive remains available through the section pages and bibliography.

2026-07-13 New page: Vestibular Function, Dizziness, and Healthy Ageing Added July 13, 2026.
2026-07-13 New page: Transposable Elements and Genome Deregulation in Ageing Added July 13, 2026.
2026-07-13 New page: Thermoregulation and Heat Vulnerability in Older Adults Added July 13, 2026.

Reference Tools

Look up definitions, trace sources, or return to a structured introduction.

Browse the glossary View the bibliography Go to Start Here

Important Educational Disclaimer

This website provides information for educational and informational purposes only. It is not medical advice. We do not diagnose, treat, or recommend protocols for any medical condition. Please consult a qualified healthcare professional for all medical decisions.