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There has never been more interest in longevity. Supplements, biological age tests, cold plunges, fasting protocols, peptides, NAD+, wearable technology and increasingly sophisticated treatments are all promoted as ways of helping us live longer or slow ageing.
Mel
There has never been more interest in longevity.
Supplements, biological age tests, cold plunges, fasting protocols, peptides, NAD+, wearable technology and increasingly sophisticated treatments are all promoted as ways of helping us live longer or slow ageing.
Some of this research is genuinely exciting.
But if we strip away the marketing, what actually has good evidence for helping us remain healthier as we age?
Perhaps surprisingly, many of the most powerful interventions aren’t particularly new or glamorous.
Living longer isn’t necessarily the same as living well for longer.
This is why you’ll increasingly hear the term healthspan — the period of our lives spent in reasonably good health and with good physical and cognitive function.
For me, this is a much more useful way to think about longevity.
The aim isn’t simply to add years to life. It’s to try to maintain strength, mobility, independence, cardiovascular and metabolic health, cognitive function and quality of life for as long as possible.
If there were a single intervention that affected almost every system involved in healthy ageing, exercise would be difficult to beat.
Regular physical activity is associated with lower risks of cardiovascular disease, type 2 diabetes and premature mortality, as well as benefits for mental health, cognitive function, mobility and bone health.
And as we get older, resistance training becomes particularly important.
We naturally lose muscle mass and strength with age. Maintaining muscle isn’t simply about appearance — it matters for balance, metabolic health, bone health, independence and our ability to continue doing the things we enjoy.
The goal doesn’t have to be extreme exercise.
Walking, moving regularly throughout the day, cardiovascular activity and some form of strength or resistance training can all contribute.
Nutrition research can become unnecessarily complicated.
There is no single food or supplement that can compensate for an otherwise poor diet.
The strongest evidence continues to favour dietary patterns built predominantly around minimally processed foods, vegetables and fruit, whole grains, legumes, nuts and seeds, adequate protein and healthy sources of fat.
As we age, maintaining adequate protein intake becomes particularly relevant because of its role in preserving muscle mass.
That doesn’t mean everyone needs the same diet.
Nutrition should take account of someone’s health, preferences, culture, activity levels and individual needs.
Sleep is sometimes treated as a lifestyle luxury.
Biologically, it isn’t.
Poor or insufficient sleep is associated with poorer metabolic and cardiovascular health and can affect mood, cognition, appetite and immune function.
There isn’t a perfect number of hours that applies to every individual, but regularly prioritising adequate, good-quality sleep is an important part of healthy ageing.
And persistent sleep problems deserve proper assessment rather than simply another supplement.
Blood pressure, cholesterol, blood glucose, smoking, body composition and physical activity all influence long-term cardiovascular and metabolic health.
Some risk factors cause few or no symptoms until disease is established.
That is why appropriate health checks and screening can be valuable.
Blood tests can sometimes form part of this picture — but more testing is not automatically better, and a blood result should always be interpreted in the appropriate clinical context.
Smoking remains one of the clearest modifiable risks to long-term health.
Stopping smoking has meaningful health benefits at virtually any age.
With alcohol, less is generally better from a health-risk perspective. Alcohol shouldn’t be viewed as a longevity intervention, even though individual studies have sometimes suggested benefits from particular patterns of drinking.
Healthy ageing includes skin health too.
Ultraviolet radiation is one of the major external contributors to premature skin ageing and is also a significant risk factor for skin cancer.
Consistent sun protection is therefore one of the most evidence-based anti-ageing interventions available.
It may not be as exciting as the latest injectable or supplement — but prevention matters.
Healthy ageing isn’t purely biological.
Maintaining social connection, continuing to learn, having purpose and remaining engaged with other people and the world around us are all associated with better wellbeing as we age.
Loneliness and social isolation are increasingly recognised as important health issues.
Looking after our future health therefore means thinking beyond blood tests, supplements and exercise programmes.
This is where things become much less certain.
Research into the biology of ageing is developing rapidly. Scientists are studying cellular senescence, mitochondrial dysfunction, epigenetic changes, altered nutrient sensing and other biological processes involved in ageing.
This research may eventually lead to new ways of preventing or delaying age-related disease.
But understanding a biological mechanism does not automatically mean that a commercially available intervention targeting that mechanism has been proven to make humans live longer or healthier lives.
That distinction is incredibly important.
Supplements and emerging longevity interventions should therefore be judged individually on the quality of the evidence behind them — not simply because they are described as “anti-ageing”, “cellular” or “longevity” treatments.
One of the most useful scientific frameworks for understanding why our bodies change with age is known as the Hallmarks of Ageing.
These describe interconnected biological processes involved in ageing — from genomic instability and telomere attrition to cellular senescence, mitochondrial dysfunction and chronic inflammation.
Understanding these processes is fascinating and may help explain where future longevity medicine is heading.
But for now, the basics still matter enormously.
My interest in longevity isn’t about promising to stop or reverse ageing.
It’s about understanding the science, identifying modifiable risks and helping people make informed decisions about the things that may genuinely support their health as they get older.
That means being interested in emerging research without automatically accepting every new longevity trend.
Sometimes the evidence supports an intervention.
Sometimes it’s promising but still developing.
And sometimes the marketing has simply got there before the science.
Healthy ageing isn’t about doing everything. It’s about concentrating on the things most likely to make a meaningful difference.
Read The 13 Hallmarks of Ageing: What They Are and Why They Matter, or explore Maverick Longevity & Wellness to learn more about my evidence-informed approach to healthy ageing.