For decades, conversations about aging have been dominated by one question: How long will we live? Advances in medicine, sanitation and public health have dramatically increased life expectancy and in many countries living into our eighties is no longer unusual.
Yet a longer life does not automatically mean a healthier one.
Many people now spend the final years and sometimes decades of life managing multiple chronic conditions, taking numerous medications and struggling with reduced mobility or cognitive decline. While we’ve become remarkably good at extending lifespan, we have been less successful at ensuring those additional years are lived with vitality, independence and purpose. This is why healthspan has become one of the most important conversations in modern healthcare.
Healthspan simply refers to the number of years we remain healthy, active and free from diseases or disability. It shifts the focus from adding years to life towards adding life to those years. Rather than asking how long we might live, it encourages us to ask a more meaningful question: How well do we want to live?
Healthy ageing starts long before old age
One of the biggest misconceptions I encounter is the belief that healthy ageing begins after retirement or once health problems appear. In reality, the foundations are laid much earlier.
Our forties and fifties often represent a turning point. Hormonal changes begin to influence muscle mass, bone density, sleep quality, metabolism and cardiovascular health. For women, the transition through perimenopause and menopause can make these changes feel particularly noticeable but ageing itself affects everyone.
The encouraging news is that these years also provide one of the greatest opportunities to influence future health. Research consistently shows that many of the conditions commonly associated with ageing including type 2 diabetes, cardiovascular disease, osteoporosis and cognitive decline, develop gradually over many years, they rarely appear overnight. Waiting until symptoms become impossible to ignore often means missing valuable opportunities for prevention.
Muscle: one of our greatest health assets
When people think about healthy aging, they often picture wrinkles, grey hair or maintaining a healthy weight. Yet one of the strongest predictors of future health receives surprisingly little attention: muscle. From around the age of 30, we naturally begin to lose muscle mass unless we actively maintain it. This gradual decline accelerates later in life and can become more pronounced during and after menopause as oestrogen levels fall.
Muscle is far more than something that helps us move. Often described as the “organ of longevity”, healthy muscle supports balance, protects our bones, improves insulin sensitivity, stores glucose, assists recovery after illness and helps us remain independent as we age.
Even something as simple as grip strength can offer valuable insight into our overall health. Grip strength is widely used by researchers as an accessible measure of general muscular strength and physical resilience. Studies involving large populations have found that weaker grip strength is associated with a greater risk of disability, cardiovascular disease and premature death. In one major international study, grip strength was a stronger predictor of all-cause and cardiovascular mortality than systolic blood pressure. This does not mean that squeezing a hand exerciser alone will extend our lives, but it does highlight how closely muscular strength is connected to long-term health and independence.
This challenges our long-standing reliance on the scales. Someone may maintain the same body weight for years while gradually losing muscle and gaining body fat, a change that remains hidden unless we look beyond BMI. Resistance exercise therefore becomes one of the most valuable investments we can make in later life. It does not require becoming a bodybuilder. Regular strength training using weights, resistance bands or body-weight exercises helps preserve muscle, maintain bone density and support metabolic health.
Nutrition should nourish, not simply reduce calories
Diet culture has conditioned many people to think primarily about eating less. Healthy aging asks us to think differently. The goal is not simply weight management but providing the body with the nutrients it needs to repair, maintain and function well over many decades.
Adequate protein becomes increasingly important as we age because older muscles become less responsive to dietary protein, meaning we often require slightly more to stimulate muscle maintenance. Including a good-quality source of protein with each meal can help support this process. Equally important is the overall dietary pattern.
The Mediterranean-style diet continues to have one of the strongest evidence bases for healthy aging. Rich in vegetables, fruit, legumes, wholegrains, extra virgin olive oil, nuts, seeds and oily fish, it provides fibre, healthy fats, antioxidants and phytonutrients that help support cardiovascular, metabolic and brain health. Rather than focusing on restriction, it encourages variety and nourishment.
Metabolic health deserves greater attention
Another important shift in recent years has been growing awareness of metabolic health.
Blood sugar regulation affects far more than diabetes risk. Large fluctuations in blood glucose can influence energy levels, mood, appetite and inflammation over time. Poor metabolic health has also been associated with increased risk of cardiovascular disease, fatty liver disease and cognitive decline. Maintaining steady blood sugar doesn’t require eliminating carbohydrates altogether.
Instead, simple habits often make the greatest difference: eating sufficient protein, including healthy fats and fibre, choosing minimally processed foods more often than ultra-processed alternatives, remaining physically active and avoiding long periods of inactivity.
These everyday behaviours create a more stable internal environment that supports long-term health.
The gut influences more than digestion
Interest in the gut microbiome has grown enormously, and rightly so. Trillions of microorganisms living within our digestive tract play important roles in digestion, immune regulation, nutrient production and communication with the brain. Although research is still evolving, growing evidence suggests that a diverse, resilient gut microbiome may contribute to healthier ageing.
Diet plays a central role. Regularly eating a wide variety of plant foods helps nourish beneficial gut bacteria. Fermented foods, where appropriate, may also contribute to microbial diversity, while limiting highly processed foods can support overall gut health.
This isn’t about chasing the latest probiotic trend. It is about creating an environment in which beneficial microbes can thrive through consistent dietary habits.
Sleep is productive, not passive
Sleep is often the first thing sacrificed when life becomes busy. Ironically, it is also one of the most powerful contributors to long-term health. During sleep the brain clears metabolic waste, tissues repair, hormones are regulated and memories are consolidated. Poor sleep over many years has been linked with increased risks of obesity, cardiovascular disease, depression and cognitive decline.
Quality sleep should therefore be viewed as an essential pillar of healthy aging rather than a luxury. Simple routines, maintaining consistent bedtimes, reducing evening exposure to bright screens, limiting alcohol close to bedtime and creating a calm sleep environment—can make a meaningful difference.
Brain health begins decades before symptoms
One of the most significant developments in recent years has been our growing understanding that dementia risk is influenced by far more than genetics.
The Lancet Commission has identified numerous modifiable risk factors that together account for a substantial proportion of dementia cases worldwide. Physical activity, blood pressure control, hearing health, smoking cessation, diabetes management, education, social engagement and treating depression all contribute to protecting long-term cognitive function.
No single intervention guarantees prevention, but together these lifestyle factors create a more resilient brain. Healthy aging therefore isn’t only about preserving physical function—it is equally about maintaining curiosity, memory, independence and the ability to continue participating fully in life.
The importance of purpose and connection
Good health extends beyond biology. People with strong social relationships consistently experience better physical and mental health outcomes than those who are socially isolated.
Purpose also matters. Whether through family, volunteering, work, creativity or lifelong learning, having reasons to get up each morning supports emotional wellbeing and often encourages healthier behaviours overall. In clinical practice, it is often these daily routines, meaningful relationships and sense of purpose that distinguish people who continue thriving well into later life from those who simply exist.
There is no shortcut to healthy ageing
The growing interest in longevity has fuelled a market full of supplements, testing kits and technologies promising to slow ageing. Some areas of research, including NAD+, NMN and personalised health monitoring, are scientifically interesting and deserve continued investigation. However, it is important not to lose sight of what decades of evidence already tell us.
No supplement has yet been shown to replace the combined benefits of regular movement, nourishing food, restorative sleep, stress management, social connection and avoiding smoking. Healthy aging rarely depends on one dramatic intervention. It is usually built through thousands of ordinary decisions repeated consistently over many years.
Looking ahead
Perhaps the greatest change taking place is not scientific but cultural. We are beginning to redefine what successful aging looks like. It is no longer simply reaching a particular birthday. It is reaching later life with the ability to travel, play with grandchildren, continue working if we choose, enjoy hobbies, recover from illness and remain independent. Healthspan reminds us that aging well is less about trying to look younger and far more about preserving the ability to live fully. While genetics certainly influence our health, they do not write the entire story. Daily habits, built gradually, remain some of the most powerful tools we possess.
Practical takeaways
- Prioritise resistance training at least twice a week to preserve muscle and bone health.
- Include a source of quality protein with each meal.
- Build meals around vegetables, wholegrains, healthy fats and minimally processed foods.
- Aim for seven to nine hours of good-quality sleep each night.
- Stay physically active throughout the day, not just during exercise sessions.
- Nurture friendships, maintain social connections and make time for activities that give you purpose.
- Focus on consistency rather than perfection, small daily habits have the greatest long-term impact.
References
Critselis, E. and Panagiotakos, D. (2020) ‘Adherence to the Mediterranean diet and healthy ageing: current evidence, biological pathways, and future directions’, Critical Reviews in Food Science and Nutrition, 60(13), pp. 2148–2157.
Greendale, G.A. et al. (2019) ‘Changes in body composition and weight during the menopause transition’, JCI Insight, 4(5), e124865.
Leong, D.P. et al. (2015) ‘Prognostic value of grip strength: findings from the Prospective Urban Rural Epidemiology study’, The Lancet, 386(9990), pp. 266–273.
Livingston, G. et al. (2024) ‘Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission’, The Lancet, 404(10452), pp. 572–628.
O’Bryan, S.J. et al. (2022) ‘Progressive resistance training for concomitant increases in muscle strength and bone mineral density in older adults: a systematic review and meta-analysis’, Sports Medicine, 52, pp. 1939–1960.
Volkert, D. et al. (2022) ‘ESPEN practical guideline: Clinical nutrition and hydration in geriatrics’, Clinical Nutrition, 41(4), pp. 958–989.
World Health Organization (2020) Decade of Healthy Ageing: Plan of Action 2021–2030. Geneva: World Health Organization.
World Health Organization (2025) ‘Ageing and health’. Geneva: World Health Organization.
Wright, V.J. et al. (2024) ‘The musculoskeletal syndrome of menopause’, Climacteric, 27(5), pp. 466–472.
