Longevity medicine is not simply about helping people live longer.
A central goal is to help people maintain their health and ability to function for as much of their life as possible.
This is where healthy aging becomes important.
Healthy aging is more than the absence of disease
It is easy to think of healthy aging as reaching older age without developing a chronic disease.
But health is more complex than a list of diagnoses.
The World Health Organization defines healthy aging around the ability to maintain the physical and mental capacities that allow us to function and support well-being as we grow older.
This includes being able to move, think, make decisions, maintain relationships and participate in the activities that matter to us.
A person can therefore live with a well-managed chronic condition and still maintain many of the abilities associated with healthy aging.
The goal is not simply to avoid disease, but to protect health and function.
How do researchers measure healthy aging?
There is no single universal test for healthy aging.
Different studies use different combinations of health outcomes.
One large long-term study involving nearly 49,000 women used a particularly comprehensive definition. Participants were considered to have achieved healthy aging if they reached older age without 11 major chronic diseases and maintained good physical function, cognitive function and mental health.
Only 7.6% of the women met all of these criteria.
This illustrates why healthy aging is a broader concept than longevity alone. Living longer is important, but how those additional years are lived matters too.
Where does longevity medicine fit?
Longevity medicine applies this principle earlier.
Rather than waiting for age-related disease or loss of function to become established, the aim is to identify modifiable risks and opportunities for prevention while a person is still healthy and active.
This may include assessment of cardiovascular and metabolic risk, body composition, physical fitness, nutrition, sleep and other factors relevant to long-term health.
The purpose is not to predict exactly how long someone will live or to promise a disease-free future.
It is to use available medical knowledge to help protect health and function over time.
Healthy aging begins before older age
Healthy aging is a lifelong process.
Nutrition, physical activity, smoking, alcohol exposure, sleep and cardiovascular and metabolic health can influence health trajectories over many years. Genetics, environment and social factors also contribute.
This means that healthy aging is relevant long before someone considers themselves “old.”
For longevity medicine, the practical question is therefore not only:
How can we live longer?
It is also:
How can we protect the health and function that allow us to live those years well?
