Healthy Ageing After 40: Forget Anti-Ageing, Focus on This Instead
Updated: Sep 28
Women, in particular, are surrounded by messages about anti-ageing. There are creams to soften lines, supplements to restore our youth, treatments to tighten things and wellness routines that promise to slow, or even reverse, the ageing process.
There is nothing wrong with wanting to care for our skin or feel good about how we look. But while so much attention is placed on the visible signs of ageing, many of the changes that matter most are happening where we cannot see them.
We cannot see ourselves gradually losing muscle. We may not feel our blood pressure or cholesterol creeping upwards. Changes in bone density, blood glucose regulation, cardiovascular health and cognitive function can develop quietly over many years.
Perhaps, instead of asking how we can look younger, we should be asking a different question: what do we want our bodies and brains to be capable of in 10, 20 or 30 years?
Will we be able to carry our own suitcase when we travel? Get down on the floor and back up again? Pick up and play with grandchildren? Continue driving, managing our own affairs, enjoying our relationships and living independently?
That is the kind of anti-ageing conversation I am interested in.
Or perhaps we should stop calling it anti-ageing altogether. Ageing is not a failure, and it is not something any of us can prevent. A much more useful goal is healthspan: living not only for longer, but spending more of those years in reasonably good health, with our strength, mobility, cognitive function and independence intact.
There are no guarantees. Genetics, illness, environment, income, access to healthcare and simple good or bad luck all influence how we age. Lifestyle is not the entire story. It is an important part of it, and that gives us something to work with.
The good news is that healthy ageing after 40 rarely comes down to anything expensive or glamorous. It comes down to a handful of fairly ordinary things we do repeatedly over many years.
What does a healthy ageing diet look like?
When it comes to longevity, individual foods matter far less than the overall pattern of how we eat.
No berry, powder, spice or supplement can compensate for a diet that is consistently low in plants, fibre and essential nutrients. Equally, we do not need to eat a perfect diet before it begins to benefit us.
The strongest evidence supports a broadly Mediterranean-style eating pattern containing plenty of vegetables and fruit, beans and lentils, wholegrains, nuts, seeds, olive oil and other unsaturated fats, with fish and fermented dairy foods included where appropriate.
Together, these foods provide fibre, healthy fats, vitamins, minerals and a wide variety of protective plant compounds. This way of eating can also support healthier blood pressure, cholesterol and blood glucose levels, and all of these matter to how the heart, blood vessels and brain age.
This does not require elaborate recipes or a complete rethink of how we eat. It might mean adding lentils to a soup, including another vegetable with dinner, choosing a more substantial wholegrain bread or replacing some meat-based meals with beans, fish or another minimally processed protein.
Rather than asking which food will help us live longer, a better question might be: what does the way I eat most weeks add up to?
What does fibre do for your body?
Fibre is unlikely to appear in a glossy anti-ageing campaign. It is not exotic, and it is difficult to package as a revolutionary wellness discovery. Yet it supports several of the areas that matter most for long-term health.
It helps regulate bowel function, supports the gut microbiome, contributes to blood glucose regulation and can help reduce cholesterol. Certain gut bacteria ferment fibre and produce short-chain fatty acids, which interact with the gut lining, immune system and metabolism.
Fibre-rich foods rarely provide fibre alone. Beans, chickpeas and lentils also give us protein, iron, folate and polyphenols. Nuts and seeds provide healthy fats and minerals, while vegetables, fruit and wholegrains contribute an enormous range of nutrients and plant compounds.
Good sources include oats, barley, quinoa, millet, brown rice, wholegrain breads and higher-fibre cereals, alongside vegetables, fruit, pulses, nuts and seeds.
If fibre intake is currently quite low, it is best increased gradually and accompanied by adequate fluid. Going from very little fibre to adding bran, beans and chia seeds to everything overnight is more likely to produce bloating than a sudden change in how you feel.
This is not about chasing an impressive fibre number for a few days. It is about steadily building more variety into the diet and allowing these foods to become part of how we normally eat.
Why does muscle strength matter as you get older?
Strength may be our greatest retirement investment.
Muscle mass and strength gradually decline with age, particularly if we do not give the body a reason to maintain them. For women, the hormonal changes associated with menopause can contribute to changes in both muscle and bone.
Unlike a wrinkle or a grey hair, this loss of muscle may not be immediately obvious. Its effects often show up later in more practical ways: finding stairs harder, becoming less steady, struggling with heavy bags or losing the confidence to do things we once took for granted.
Strength is not just something we need in a gym. We need it to carry our shopping or suitcase, get up from the floor and stay steady on uneven ground. It gives us the strength and flexibility to lift and play with grandchildren, continue travelling and remain independent for longer.
When we think about preparing financially for retirement, we understand the value of investing early and contributing regularly. Muscle works in a surprisingly similar way. We need to build and maintain it before we urgently need it.
In that sense, strength may be one of the greatest investments we can make in our retirement.
In Ireland, frailty is not something that only shows up in your seventies. A comparative study using TILDA data found frailty markers already present in 8.5% of adults aged 50 to 59 in the Republic of Ireland. The muscle we are not building in our forties is often the muscle we are already missing by our fifties.
One particularly interesting study involved almost 140,000 adults from 17 countries. Researchers measured grip strength and followed participants for an average of four years. Lower grip strength was associated with a higher risk of death from all causes and from cardiovascular disease. Most strikingly, grip strength was a stronger predictor of mortality than systolic blood pressure.
That does not mean repeatedly squeezing a hand-grip device will make us live longer. Grip strength is likely to be a marker of overall muscle strength, physical function, nutritional status and underlying health. However, the study makes an important point: strength tells us something about how well the body is ageing, not simply how much someone can lift in a gym. Read the PURE study on PubMed.
A well-rounded approach to movement includes resistance exercise to maintain muscle and bone, aerobic activity for cardiovascular and respiratory fitness, balance and flexibility work to support mobility, and plenty of everyday movement.
It does not need to be extreme. It needs to be appropriate to our current ability, challenging enough to help us progress and realistic enough to continue.
How much protein do men and women need after 40?
Exercise provides the stimulus to maintain and build muscle, but the body also needs adequate protein to support that process.
Government guidelines put the minimum at 0.83g of protein per kilogram of body weight per day, roughly 55 to 65g for the average adult. More current thinking, particularly for people prioritising muscle maintenance as they age, points to somewhere between 1.2 and 1.6g per kilogram, closer to 65 to 100g a day depending on age, goals and activity level.
Protein can become particularly important as we grow older and during periods of illness, recovery or reduced appetite. Yet many people eat very little protein during the first half of the day and then try to make up for it with a large serving at dinner.
Distributing protein more evenly across our meals gives the body regular opportunities to use it.
Depending on our preferences, protein can come from eggs, fish, poultry, dairy foods, tofu, tempeh, beans, lentils, nuts and seeds. It may be as simple as adding Greek or natural yoghurt at breakfast, including eggs or beans at lunch, adding lentils to soup or making sure dinner contains a recognisable protein source.
This is another area where the basics may be less exciting than the marketing hype around them, but they matter considerably more.
Is heart health connected to brain health?
For many people, one of the greatest concerns about growing older is not how they will look, but whether they will remain cognitively well.
Brain health is sometimes discussed as though it were separate from the health of the rest of the body. It is not. The brain depends on a healthy blood supply, and the conditions that damage blood vessels elsewhere can also affect the vessels supplying the brain.
High blood pressure, diabetes, raised cholesterol, smoking and physical inactivity can therefore affect cognitive health as well as cardiovascular health. Looking after the heart and our metabolic health is an important part of looking after the brain.
Diet matters here too, but once again there is no single “brain food.” A Mediterranean-style pattern provides unsaturated fats, omega-3 fatty acids, folate and other B vitamins, vitamin E and polyphenols. These nutrients come packaged together in foods such as oily fish, olive oil, nuts, seeds, vegetables, berries, beans and wholegrains.
Exercise also supports blood flow, glucose regulation and cardiovascular health. Both aerobic and resistance exercise are relevant here, and not just for preserving physical function. They support cognitive health too.
The brain also benefits from continuing to be challenged. That does not necessarily mean downloading a brain-training app or doing a crossword every day if you hate crosswords. Learning a language, reading, playing music, dancing, taking a course or becoming absorbed in a new hobby can all challenge the brain in different ways.
What matters is continuing to give it something interesting to do.
We cannot guarantee that eating well, exercising and staying mentally active will prevent dementia. That would be an irresponsible promise. What we can do is address some of the factors associated with cognitive decline while also supporting cardiovascular health, mood, mobility and everyday quality of life.
Can loneliness affect how well you age?
Health conversations have a tendency to come back to food and exercise, but people do not thrive on nutrients and steps alone.
Supportive relationships can influence mood, stress, activity levels, eating habits and our willingness to seek help when something is wrong. Conversation itself asks the brain to listen, interpret, remember and respond. Feeling connected also gives us reasons to get up, go out and remain involved in life.
That does not mean everyone needs a huge friendship group or a packed social calendar. Some people thrive in groups; others prefer a handful of close relationships. The quality and meaning of the connection matter.
It might come from family, friends, neighbours, a walking group, book club, choir, exercise class, volunteering or a community organisation. Walking with a friend or sharing a meal gives us more than exercise or nutrition alone. It brings connection into the picture too.
Loneliness cannot always be fixed by telling someone to “join a group.” Bereavement, retirement, illness and caring responsibilities can make social connection genuinely difficult. But our relationships still deserve to be viewed as part of our health, rather than as an optional extra once everything else is taken care of.
What does oral health have to do with healthy ageing?
Oral health often sits in a separate box from the rest of healthcare, but our teeth and gums are not disconnected from what happens elsewhere in the body.
Gum disease involves chronic inflammation and shares risk factors with conditions such as cardiovascular disease and diabetes. Diabetes can increase susceptibility to gum disease, while significant gum inflammation may make blood glucose more difficult to manage.
There is a very practical nutritional connection too. Painful teeth, missing teeth or poorly fitting dentures can make eating difficult. People may begin avoiding apples, raw vegetables, nuts, meat and other foods that require more chewing, gradually reducing the variety and quality of their diet.
Oral health may also intersect with cognitive health. Prospective studies have found associations between tooth loss and later cognitive decline, although this does not prove that tooth loss directly causes dementia. Shared risk factors, inflammation, nutrition and changes in chewing may all play a part.
In one 15-year study of older men, tooth loss was associated with a greater likelihood of mild cognitive impairment or dementia, and reduced dietary diversity appeared to explain some of that relationship. Read the study on PubMed.
Oral health is therefore about much more than appearance. Being able to chew comfortably, enjoy a varied diet and live without dental pain all contribute to health and quality of life.
What are the non-negotiables for ageing well?
Some things matter too much to leave out.
No honest discussion about longevity can avoid smoking.
Not smoking, or getting support to stop, is one of the most significant steps we can take to reduce the risk of cardiovascular disease, respiratory disease, several cancers and premature death. Stopping is worthwhile even after many years of smoking.
Drinking less alcohol is also better for long-term health, and we do not need to drink alcohol to gain a health benefit.
Keeping on top of routine healthcare matters too. We can eat very well and exercise regularly, but we still need to know if our blood pressure, cholesterol or blood glucose is elevated.
Screening, dental and eye checks, assessment of bone health where appropriate, and following up persistent or unexplained symptoms all form part of ageing well. Lifestyle supports healthcare; it does not replace it.
Ageing well does not require perfect living
Longevity advice can easily become another source of pressure, particularly for women who have already spent years being told to eat less, weigh less and look younger.
I do not think we need to turn ageing into another full-time job.
We do not need to control every meal, monitor every bodily function or buy everything labelled “anti-ageing.” We need to pay attention to the foundations: our cardiovascular and metabolic health, cognitive function, muscles, bones, mobility, relationships and sense of purpose.
Perhaps the most useful question is not, “How can I stop myself from ageing?” but, “What am I doing now that my future self will be glad of?”
The answers may sound ordinary: eating more fibre, including enough protein, building strength, staying active and connected, not smoking and keeping on top of our health checks.
These actions do not have the novelty of a new longevity supplement or the instant appeal of a cosmetic treatment. Their value is in their cumulative effect. Repeated over months and years, they help us build the physical, cognitive and emotional reserves we may draw on later.
The goal is not to deny ageing or to look untouched by time. It is to remain capable, engaged, connected and independent for as long as possible.
That is a much more worthwhile investment than anti-ageing.
It is an investment in ageing well.
None of this needs a supplement subscription or a new routine starting tomorrow. It needs the same handful of ordinary things, done on repeat, for years. If that is the kind of thing you would like landing in your inbox each week, practical, real-world nutrition guidance without the noise, you can subscribe to our newsletter today.
Further reading
Bone loss and muscle loss share the same window of opportunity: your forties. This piece goes deeper into what's happening to bone density specifically, and what actually protects it.
A fuller look at fibre, the gut microbiome, and how to increase fibre intake without the bloating.
The whole-diet pattern behind the advice in this piece, covered in full.
FAQ
What is healthy ageing?
Healthy ageing means spending more of your years in reasonably good health, not just living longer. It focuses on keeping strength, mobility, cognitive function and independence intact as you get older, rather than only adding years to your life. Genetics and circumstances play a role, but everyday habits such as diet, movement, sleep and connection have a meaningful and repeated effect over time.
What is the difference between healthspan and lifespan?
Lifespan is simply how long you live. Healthspan is how many of those years are spent in good health, free from significant disease or disability. Two people can share the same lifespan and have very different healthspans. The goal of healthy ageing is closing the gap between the two, so more years are spent feeling capable rather than managing illness.
What are the best foods for healthy ageing after 40?
No single food drives healthy ageing. A broadly Mediterranean-style pattern, rich in vegetables, fruit, wholegrains, beans and lentils, nuts, seeds and olive oil, with fish and fermented dairy included, has the strongest evidence behind it. Fibre and protein matter particularly, supporting gut health, blood sugar regulation and muscle maintenance as we age.
How much protein do I need as I get older?
Government guidelines put the minimum at 0.83g of protein per kilogram of body weight per day, roughly 55 to 65g for most adults. More current thinking, especially for people prioritising muscle maintenance, points closer to 1.2 to 1.6g per kilogram, or roughly 65 to 100g a day, depending on age, goals and activity level.
Is it too late to start improving healthy ageing at 40?
No. Forty is, if anything, an ideal starting point. Muscle, bone density and cardiovascular health are all still highly responsive to changes in diet and activity in your forties and fifties. The habits that support healthy ageing work cumulatively, so starting now gives you more years to benefit from them than waiting until symptoms appear.
About the Author
Ciara Ryan (DipNT, mNTOI) is a Nutritional Therapist based in Drogheda, specialising in metabolic health, digestive health, and supporting women through perimenopause. She has over a decade of clinical experience and also delivers workplace wellbeing seminars for organisations across Ireland. Read more about Ciara.
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