What is longevity? Healthy ageing, skin longevity and a personal plan

What does longevity mean?

"Longevity" simply means a long life. In medicine, the more meaningful version is healthy ageing: increasing the years a person lives without disease and loss of function.

Two concepts need to be kept apart:

• Lifespan: The total time from birth to death.
• Healthspan: The period in which a person largely keeps their physical, mental and social function.

The World Health Organization stresses that ageing does not progress at the same pace or in the same way for everyone; genetics, the physical environment, social conditions and daily habits all shape healthy ageing. The basic steps that lower the risk of chronic disease are a balanced diet, regular movement and staying away from tobacco.

What does a longevity clinic do?

A good longevity approach does not start by offering everyone the same test panel, serum or supplement. It starts by establishing the person's current health, risks and goals.

An assessment can generally cover:

• A detailed health history: Existing conditions, medicines and supplements in use, family history, sleep, diet, activity level, tobacco and alcohol.
• Basic measurements: Blood pressure, weight and waist circumference.
• Screening chosen for the person: Tests selected by age, sex, family history, symptoms and individual risk.
• Functional assessment: Muscle strength, balance, mobility and, when needed, cognitive or mental well-being.
• A workable plan: Measurable goals for diet, exercise, sleep, stress, skin health and any medical follow-up needed.
• Follow-up: Judging results by clinical change over time, not by a single laboratory value.

The aim is not "the more tests, the better". Unnecessary tests can lead to incidental findings, anxiety and further unnecessary procedures. The right approach is to choose the assessments whose result would actually change a medical decision.

How is a personal longevity plan built?

1. Make movement the base of daily life

Regular physical activity helps lower the risk of cardiovascular disease, type 2 diabetes and some cancers, and supports sleep and mental health. The World Health Organization sets at least 150 minutes of moderate activity a week as the baseline for adults, with muscle-strengthening work as an important part of the plan. Balance exercises become more important with age.

A good exercise programme is not the hardest one kept up for a few weeks. It is the one that suits the person's health, can be progressed and can be sustained for years.

2. Focus on the overall diet, not a single food

Coffee, tea, dark chocolate or a particular fruit does not deliver longevity on its own. The real difference comes from the overall eating pattern. The World Health Organization says a healthy diet rests on adequacy, balance, moderation and variety, with minimally processed and unprocessed foods as the foundation.

Standard diet lists that ignore a person's metabolic conditions, medicines, kidney and liver function and daily routine may not be appropriate.

3. Treat sleep as a health marker, not "spare time"

For most adults, regular and good-quality sleep is a basic need. The Centers for Disease Control and Prevention recommends at least 7 hours a night for adults aged 18 to 60, and similar age-appropriate ranges later in life. Persistent snoring, apnoea, waking unrefreshed or excessive daytime sleepiness should not be met with sleep-hygiene tips alone; a possible sleep disorder should be assessed.

4. Manage tobacco, alcohol and chronic disease risk

The strongest part of a longevity plan is usually not the flashiest. Staying away from tobacco, cutting down on or stopping alcohol, keeping track of blood pressure, blood sugar and cholesterol, and not skipping age- and risk-appropriate cancer screening rest on far firmer ground than experimental interventions.

5. Act before muscle, bone and function are lost

The number on the scales is not a sufficient health marker on its own. Muscle strength, mobility, balance and bone health should be followed, especially from middle age onwards. The goal is not only to lose weight but to keep the metabolic and physical capacity needed for an independent daily life.

6. Include mental and social well-being in the plan

Chronic stress, depression, loneliness and sleep problems affect both quality of life and the ability to keep up healthy habits. Longevity is not made of laboratory results alone; a person's relationships, sense of purpose, mental health and everyday satisfaction are part of the plan.

What is skin longevity?

Skin longevity aims not just to make skin look younger, but to preserve its barrier function, resilience, moisture balance and healthy appearance over time. What I offer under this heading at the clinic is described on the longevity page.

The first step here is not an expensive or complex procedure:

• Consistent sun protection
• Gentle cleansing suited to the skin type
• Moisturising that supports the barrier
• Avoiding tobacco
• Active ingredients where needed, under a physician's supervision
• Professional treatments tailored to the problem and the skin

The American Academy of Dermatology notes that sun protection helps reduce signs of premature skin ageing such as age spots, sagging and wrinkles, as well as the risk of sunburn and skin cancer.

Retinoids can help with some concerns such as fine lines and uneven pigmentation, but because of the risk of sensitivity and irritation it is important to start at a low frequency and choose a product suited to the person. In special situations such as pregnancy, a physician's advice is needed.

Botulinum toxin, fillers, biostimulators and device-based treatments can improve appearance and some skin qualities in the right patient. They do not, however, slow whole-body ageing and should never be presented as extending life. In a skin longevity plan, the choice of procedure should weigh skin quality, facial anatomy, expectations, medical history and risks together.

Does NMN really extend life?

Nicotinamide mononucleotide (NMN), a derivative of vitamin B3, is one of the precursors of NAD⁺, a molecule involved in energy metabolism. Results from animal studies have raised interest in NMN and other NAD⁺ precursors. But an effect seen in animals cannot be assumed to appear in the same way in humans.

A comprehensive 2025 scientific review reports that NAD⁺ precursors can change some biological measurements in human studies, but that the clinical benefit for healthy ageing is limited and inconsistent. More research is needed on age-related NAD⁺ changes in human tissues and on long-term outcomes.

So, as things stand today:

• NMN has not been shown to extend human life.
• Short-term safety data do not mean it is safe long term or for everyone.
• Dose, purity, coexisting conditions and drug interactions all matter.
• Data on oral NMN do not prove that intravenous NAD treatments work.

Supplements are not automatically safe because they are "natural". Unnecessary supplements can interact with medicines, cause side effects or simply do nothing.

Should Bryan Johnson's longevity programme be a model?

Bryan Johnson is one of the most visible names in the field, with an intensive programme combining sleep, diet, exercise, frequent measurement, a large number of supplements and various experimental interventions.

The most reasonable message to take from it is the value of making health behaviours measurable and consistent. But one person's results are not a scientific study. Personal experiments are limited by the lack of a control group, of long-term safety data and of generalisability to other people. The experimental drugs and procedures in the programme should not be copied without a physician's assessment. The main scientific criticism of Johnson's approach is precisely that interventions without established evidence are packaged together with well-established healthy habits.

Are biological age tests reliable?

"Biological age" tests compare certain biomarkers with those of a person's age group and produce an estimated score. They can be useful in research, but different tests can give the same person different results. A score that drops by a few years does not by itself prove that the person has become that much younger or will live longer.

If these tests are used, the purpose should go beyond curiosity: Will the result change a clinical decision? Has the method been validated? Does it give a similar result when repeated under the same conditions? Most importantly, are modifiable risks such as blood pressure, blood sugar, muscle strength, sleep and tobacco use being overlooked?

Frequently asked questions about longevity

Is there a longevity treatment?

There is no single approved "longevity treatment" that stops ageing or definitively extends human life. The approach with the strongest evidence is identifying individual risks, using preventive health services and keeping up sustainable habits, all together.

Which tests are done for longevity?

There is no standard panel that applies to everyone. Tests should be chosen by age, symptoms, family history, existing conditions, medicines and examination findings. More tests do not always mean better health.

Which supplements should be used for longevity?

First, check whether there is a deficiency or a specific need. Supplements should be chosen with the person's diet, conditions, medicines and laboratory results in mind. No supplement replaces exercise, sleep, a balanced diet and tobacco control.

Are skin longevity and anti-ageing the same thing?

Not quite. Anti-ageing usually describes reducing the visible signs of ageing. Skin longevity takes the broader aim of preserving the skin's function, barrier and healthy appearance over the long term.

At what age should a longevity plan start?

There is no "too early" for healthy habits. What the plan contains changes with age: prevention and habits in young adults, early detection of risk in middle age, and muscle strength, balance, independence and the management of multiple conditions later in life.

In short: longevity is not a product but a sustainable health strategy

A realistic longevity approach does not rest on a single serum, supplement, device or laboratory score. The strongest starting points are still regular movement, a balanced diet, good sleep, staying away from tobacco, managing chronic disease risk and age-appropriate health checks.

Skin health is the visible, but not the only, part of this whole. Aesthetic medicine, when planned with the right indication, a natural result in mind and a personal plan, can support how a person feels and their skin-care goals; it does not replace preventive medicine.

My aim is not to offer everyone the same treatment, but to understand each person's needs and build a natural, measured and safe road map. For a personal assessment, you can reach us through the contact page.