Living longer matters. Living those years well matters more. Healthspan is the measure we organize our work around, and the reason we insist on clear evidence.
“We make rigorous science understandable, actionable and accessible, so people, clinicians and communities can make better long-term health decisions.”
- 6 in 10U.S. adults live with at least one chronic disease, and chronic diseases are the leading causes of death and disability.Source: CDC, National Center for Chronic Disease Prevention and Health Promotion
- 4 in 10U.S. adults live with two or more chronic conditions, most of them shaped by sleep, diet, movement and tobacco use.Source: CDC, National Center for Chronic Disease Prevention and Health Promotion
- 80%At least this share of premature heart disease, stroke and type 2 diabetes could be prevented by addressing known risk factors.Source: World Health Organization, Preventing chronic diseases: a vital investment
Population figures describe groups, not individuals. Every number on this site links to its source and states its limits.
Longevity writing is full of words that sound precise and are not. These are the ones we use, and what we mean by them.
- 01
Healthspan
The years of life lived in good health, free from serious chronic disease and disability.
- 02
Lifespan
The total number of years a person lives. A longer lifespan is not the same as more years in good health.
- 03
Population risk
How often an outcome occurs across a group. It describes the group, not a prediction for one person.
- 04
Evidence quality
How much confidence a finding deserves, judged by study design, size, consistency and whether it has been repeated.
- 05
Prevention
Actions that lower the chance of disease or delay it, from daily habits to screening decided with a clinician.
- 06
Uncertainty
What the research does not yet know. We say so on the page instead of rounding it away.
These areas account for most of the difference between living long and living well. They change slowly, they respond to daily decisions, and they are where clear evidence matters most.
Explore the library- 01
Sleep and recovery
Short and irregular sleep is associated with poorer glucose control, lower mood and more injuries.
We explain duration, quality and circadian timing, and what the evidence supports for improving each.
- 02
Metabolic health
Insulin resistance and unfavorable body composition often develop for years before a diagnosis.
We cover glucose regulation, body composition and cardiometabolic risk in language you can use at a check-up.
- 03
Movement and performance
Strength, aerobic fitness and mobility are among the strongest predictors of independence later in life.
We translate training research into safe, realistic guidance for every starting point.
- 04
Mental and social health
Mood, cognition and social connection track closely with physical health across the lifespan.
We look at resilience, connection and behavior change without hype, shame or jargon.
One topic never tells the full story. The library brings primers, explainers, research summaries and reports together, each reviewed, cited and dated.
A clear, evidence-led approach to long-term health, built for people, clinicians and communities.