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Longevity, radical life extension and anti-aging: what the terms mean and how the clinics differ

Longevity, radical life extension and anti-aging are often used as if they meant the same thing. They do not. This page explains each term as researchers and health agencies use it, describes what longevity clinics, anti-aging clinics and biohacking say they offer, and lists what to check whatever the label. It does not recommend any treatment or clinic, and it makes no claim that any procedure extends life or slows ageing.

What does longevity mean?

Longevity is how long a person lives: their lifespan. Researchers increasingly separate it from healthspan, the years of life spent in good health. The US National Institute on Aging (NIA) describes the goal of research in this area as increasing "the years of healthy life – the healthspan – rather than simply lifespan".

The World Health Organization explains that, at the biological level, ageing results from the build-up of many kinds of molecular and cellular damage over time. The United Nations has declared 2021–2030 the Decade of Healthy Ageing.

Longevity medicine is a newer name for a field of clinical practice. A 2021 comment in The Lancet Healthy Longevity00024-6) defines it as personalised preventive medicine based on biomarkers of ageing, drawing on biogerontology, geroscience and preventive medicine. The authors call for training doctors in it and say such training should help to tell longevity medicine apart from anti-aging. A 2024 review in GeroScience uses the term "healthy longevity medicine": care that brings geroscience into clinics and aims to optimise health and healthspan.

What is geroscience?

Geroscience studies the biology of ageing and how it relates to the diseases of later life. The NIA says the field seeks to understand why ageing is a major risk factor for common chronic conditions such as heart disease, diabetes, many cancers, arthritis and frailty. The same NIA page states that "aging itself is not a disease".

The idea behind geroscience is to target the ageing process itself rather than one disease at a time. A 2014 paper in Cell by a group of ageing researchers, one of them from the NIA, notes that ageing in mammals can be delayed in laboratory studies with genetic, dietary and drug approaches. It argues that because ageing is the greatest risk factor for most chronic diseases, more research should aim at extending human healthspan. These findings come mainly from animal studies; they do not show that any treatment sold today slows human ageing.

What is radical life extension?

Radical life extension means lengthening the human lifespan far beyond today's limits. In a 2013 survey report, the Pew Research Center described it as treatments that would let the average person live decades longer, to at least 120 years. The report notes that no such method exists.

The term belongs to research and public debate, not to any treatment on sale. In the Pew survey, 56% of US adults said they would not want such treatments themselves, and about half said radical life extension would be bad for society.

How do these terms differ from traditional anti-aging?

"Anti-aging" has more than one meaning. It is often used about appearance: skin, wrinkles and how old a person looks. A 2019 review in the International Journal of Dermatology, for example, discusses hormone replacement as a way to prevent skin ageing. We cite it only as an example of how hormones are presented in anti-aging care, not for its conclusions on safety or effect.

Some writers use "anti-ageing medicine" for something wider. A 2021 essay in Heart, Lung and Circulation describes its defining idea as treating ageing to prevent the diseases that follow it, through early detection, prevention and treatment of age-related disease. The authors argue against that approach.

Longevity and geroscience, by contrast, are framed around biological ageing and healthspan rather than appearance. In practice the labels overlap, as the next section shows.

Longevity clinics, anti-aging clinics and biohacking: what each usually offers

Longevity clinics and services

The 2024 GeroScience review describes healthy longevity clinics set up inside publicly funded academic hospitals in Singapore, Israel and the United States. It notes that private clinics emerged first, to meet demand from people seeking tests and treatments for healthy longevity. According to the review, an assessment in these clinics includes:

The stated aim of the testing is not to find existing disease but to spot early signs of age-related decline in function. Interventions fall into four groups: lifestyle (diet, activity, stress, sleep, social connection, avoiding risky substances), supplements, existing medicines being studied for new uses, and social and environmental measures. The review stresses that the medicines and supplements still need further trials. The team usually includes doctors, nurses, dietitians, physiotherapists, mental health professionals, pharmacists and health coaches.

A 2025 editorial in Aging describes private longevity clinics more broadly. It says they claim to combine extensive testing, such as genetic tests, full-body scans and epigenetic "biological age" tests, with programmes that may include exercise, nutrition, supplements, hormone replacement and experimental therapies such as stem-cell infusions, peptide injections and plasma exchange. The author argues that the precision and clinical use of biological-age tests are still debated, that some therapies are offered without robust safety data, and that many clinics present themselves as wellness providers and so avoid medical oversight. A 2026 opinion column in The BMJ argues that private longevity clinics typically offer many tests not recommended for routine screening, with risks of false positives and further tests. A 2025 BMJ editorial calls for separating evidence-based longevity medicine from commercially marketed wellness services.

Anti-aging clinics

In the sources we read, anti-aging care centres on appearance: skin ageing and how a person looks, with hormone programmes among the treatments presented for it. Our Anti-aging collection groups the procedures people compare for age-related changes in appearance, such as facelift and eyelid surgery.

Biohacking

There is no single description of biohacking. A 2025 review in the Journal of Hand Surgery Global Online describes it as people making changes to their bodies to improve their well-being, from phone apps and wearables that track sleep and exercise to implanted microchips. It reports that chip implants are usually placed by tattoo or piercing artists rather than in a medical setting, and that their safety has not been studied in depth. A 2026 narrative review in Cureus describes online biohacking and wellness communities that promote peptides for weight loss, recovery, appearance, thinking and longevity, often bought on a grey market and self-injected outside medical supervision.

The sources we found describe biohacking as a practice and a community, not as a kind of clinic. We found no source that describes "biohacking centres" as a type of provider, so we do not describe them here.

Where the labels overlap

The same treatment can appear under more than one label. Hormone replacement is described in the anti-aging review and in the Aging editorial's account of longevity clinics. The Cureus review links the promotion of peptides to biohacking culture, longevity medicine and wellness clinics alike. The label on a clinic or a programme says nothing about whether a treatment works, whether it is safe, or the quality of the care.

Whatever the label, you can check:

Our guides explain how to check a doctor, by country and what a clinic's accreditation marks mean.

What this site compares

We compare the prices and terms that clinics abroad publish on their own websites, not whether a treatment works:

Sources

All sources were opened and checked on 6 November 2026. Editorials, comments, columns and essays are marked as opinion in the text.