Wellness
Loss of senses impacts mental health and loneliness in ageing adults

New research shows sensory decline in older adults is linked to worse mental health and increased loneliness.
Most people — up to 94% of U.S. adults — experience at least some dulling of their senses with age, finding themselves squinting at screens, craving stronger flavours, and missing snatches of conversations more and more frequently.
Researchers at the University of Chicago Medicine are looking into how these changes can go beyond mere inconvenience and actually worsen overall mental health in older adults.
“When your senses decline, you can’t experience the world as well,” said Jayant Pinto, MD, a physician and expert in olfactory dysfunction at UChicago Medicine.
“You can’t hear colleagues or friends at the dinner table; you can’t discern what’s going on in your environment; you may have a hard time reading or making things out when you’re in your neighborhood. It makes all your cognitive burdens a little harder, and that probably wears you down over time and causes mental health problems.”
Along with Alexander Wang, a medical student at the UChicago Pritzker School of Medicine, Pinto recently led a study examining the prevalence and impact of sensory impairments among older adults.
They found that people with sensory disabilities tend to have worse mental health, and that different types of sensory disability were associated with different aspects of mental health.
Revealing associations between perception and emotion
The UChicago researchers analysed data on sensory function (vision, hearing and sense of smell) and self-reported mental health from nearly 4,000 older adults, collected over 10 years of follow-up as part of the National Social Life, Health & Aging Project.
They found that people who had multiple senses impaired experienced more loneliness and had significantly worse self-reported mental health overall, and people with three sensory disabilities were more likely to experience frequent depressive episodes. In analyses that differentiated between the senses, vision impairment was most strongly associated with both loneliness and poor self-rated mental health.
Scientists are still exploring how changes in all five senses can impact people, but the UChicago researchers can already point to many ways sensory decline contributes directly to feelings of loneliness, sadness and boredom.
Older people with vision impairment may have trouble getting out of the house or seeing the faces of their friends and family, and hearing loss can make conversations stilted and frustrating.
Even loss of smell can affect someone’s ability to find joy in familiar scents — like a favourite home-cooked meal or a loved one’s signature perfume — and perceive pheromones, which (though not registered consciously) contribute to social dynamics.
“We saw that hearing and vision disability tended to be associated with lower self-rated mental health and feelings of loneliness, but olfactory disability had a weaker association,” Wang said.
“This stood out to me because hearing and vision disabilities tend to be much more stigmatized than olfactory disability. This made me reflect on the ways in which social stigma may be driving this worse mental health.”
Caring for one another in an aging society
In the face of that stigma, the researchers say their results highlight the importance of improving access to mental health services and increasing awareness of the connection between sensory loss and mental distress.
In particular, understanding how different sensory disabilities impact the long-term mental health of older adults could help healthcare professionals — especially primary care providers, otolaryngologists and ophthalmologists — screen for mental health conditions when they identify sensory loss in their patients, providing opportunities for personalised and timely interventions.
In addition to proactively treating older adults’ mental health, the researchers pointed to steps that can be taken to directly lessen the day-to-day effects of sensory difficulties, which would in turn lessen their negative mental health implications.
“We have an aging society; everybody has a relative who’s getting older and having a harder time in life. It’s a burden for us all to share,” Pinto said.
“Lessening the burdens of your aging relatives and friends can have a huge impact on people’s lives, their productivity and their quality of life.”
On a personal level, family members and friends can help by being patient and finding ways to communicate more effectively, such as speaking clearly or using written notes. On a societal level, public policies and community programs can ensure accessibility in public spaces and provide resources that improve quality of life.
Pinto also highlighted a wide range of technologies and medical interventions are available that can help compensate for sensory impairment. For hearing loss, there are cochlear implants, hearing aids and other hearing-assistive devices — which research has indicated could slow cognitive decline in addition to improving quality of life.
For vision loss, there are glasses, contacts, cataract surgery and LASIK surgery, along with accommodations like text-to-speech computer programs. Even for the sense of smell, health experts can sometimes help by reducing sinus inflammation or conducting smell training exercises.
“In many cases, we can mitigate sensory difficulties in ways that might actually improve people’s lives, mental health and sense of loneliness — which is a huge epidemic,” Pinto said.
“These are simple ways we can intervene to help people and potentially have a huge impact on society.”
Recognising and destigmatising sensory disability
The researchers said they intentionally used the word “disability” throughout the paper to underscore the significant impact of sensory impairments on individuals’ lives. This terminology also aligns with efforts to destigmatise these conditions and promote a more inclusive approach to healthcare.
“To some extent, our society already considers decreased sensory function to be a disability: think of the blind and d/Deaf communities,” Wang said.
“Like many marginalised communities, the disabled community has historically had a very contentious relationship with the medical field, which can cause distress and limit access to mental health services. With better understanding and compassion, we can strive to improve the care we provide to older adults and disabled patients.”
He said that by framing the data this way, he hopes to encourage more healthcare providers to move away from thinking in terms of the Medical Model of Disability and move towards the Social Model of Disability.
“My understanding is that the Medical Model characterises disability as something that is ‘deficient’ with a person, thus requiring some sort of ‘fixing’ of the individual,” he explained.
“The Social Model characterizes disability as more of an identity, so limitations relating to disability stem from a society’s lack of accessibility and accommodation for disabled people.”
Recognising sensory impairments as disabilities and acknowledging their impact on mental health are important steps toward more comprehensive and compassionate care. By addressing the medical, social and environmental barriers that exacerbate these impairments, clinicians — and society as a whole — can better support older adults in maintaining their independence.
News
Interview: Dr Matthew Bennett on building resilience and a pain-free healthspan

Harnessing the multi-dimensional capabilities of the human body is key to overcoming chronic pain and boosting longevity, say the authors of a new book.
While the primary focus of established health care systems is to target pain points through medication or surgery a more holistic approach is emerging, as US chronic pain doctor Matthew Bennett explains.
Published late last year by Dr Bennett and colleague Dr Sahar Swidan’s book, Mastering Chronic Pain: How Peak Resilience Unlocks Your Potential offers grounded insights into pain resolution.
Speaking to Agetech World from his New York base he said: “I’ve been treating patients in chronic pain for over 20 years.
“And, it becomes obvious that while some pain is very responsive to simple interventions, like a nerve block or a surgery, there’s a large number of people which that does not move the needle for.
“We used to look at it like, ‘Hey, the MRI shows this one spot that’s pushing on this one nerve. If we can take that spot off that nerve, everything’s going to be better’.
“And, that just doesn’t always play out that way. It’s become apparent that there are a lot of situations where the problem is more systemic.
“It’s really more of a metabolic problem, and pain is the expression of these system failures.”
‘Fight or flight’
The upstream drivers of acute pain can be numerous as Dr Bennett explains: “You can take as much pressure as you want off of nerves, but if your inflammatory system isn’t fixed, if the neurological system isn’t fixed, if your autonomic nervous system – meaning your fight-or-flight versus your rest-and-relaxation – isn’t balanced, if your gut biome is off, if your sleep is off – a lot of these problems aren’t going to improve.”
Key elements in developing a longevity-focused healthpsan – devoid of chronic pain and opioids – are simple, every day measures, focused on movement, sleep and breathing.
This includes developing the right muscles to create a ‘good deep core musculature’.
He continued: “An even bigger one is the way people breathe – the way they use their diaphragm.
“The diaphragm is a great big muscle that controls the deep core part of the spine. When the diaphragm’s not working correctly, the whole core musculature isn’t working right.
“You can’t get that stability in the lower spine, so other muscles jump in and try to do the work for you. That causes downstream problems.
“You need someone getting to that root cause,.. (and) we teach people how to do that, and they’ll have big breakthroughs.”
He continued: “Sleep is a big problem in people with chronic pain. There’s a lot of healing that occurs with deep sleep.
“Unfortunately, in a lot of pain states, sleep gets disrupted, and people can’t get into deep sleep, so the brain can’t clear itself of the byproducts of metabolism; that glymphatic system doesn’t work.
“Poor sleep also interferes with endocrine connectors; growth or sex hormones can be depleted. Obstructive sleep apnea can play a huge role. There’s just a big correlation between sleep disorders and chronic pain.”
Seeking calm
These key elements of Dr Bennett’s work – which has been described as ‘biopsychosocial’ – come concomitant with a keen focus on nervous systems, chronic inflammation and neuroplasticity.
Dr Bennett, co-founder of NoceViva, continued: “When we think about neurologics, one of the things that’s very far upstream of a lot of health is the balance between the fight-or-flight system and the rest-and-relaxation system – that autonomic nervous system.
“All of these things are ‘two-way streets’ with pain; meaning the pain can cause the dysfunction, and the dysfunction can cause the pain; it becomes this feedback cycle where things get entrenched in a bad loop.
“So, balancing that autonomic nervous system is a really helpful upstream fix to make. Simple things like breathwork. Some people do well with meditation.
“Some people do well with making sure they’re involved in hobbies. These are things that can help just calm that fight-or-flight system down.”
Nerves & neuroplasticity
Allowing ourselves to adjust to emerging health challenges is achievable in the right settings and with the right approach.
He continued: “The body’s nervous system has the ability to change. And it can change based on various inputs.
“The nervous system can become increasingly sensitised, or it can become de-sensitised. And so that’s one of the bigger things that we see in the chronic pain state, is this sensitisation that comes along with it.
“This neuroplasticity can make the nerves in the extremities more sensitive.
“It can also make the nerves in the central nervous system more sensitive – so nerves in the spinal cord, or even nerves in the brain can become hyper-sensitised – so they’re triggering more of a pain response in the person.
“But the same thing that can cause the system to go in what we would consider a bad direction, where it gets more sensitive, the neuroplasticity can actually become undone, and you can make the nerves less sensitive.”
AI to boost lifespan?
Looking ahead Dr Bennett foresees a future where a deeper understanding of the functional pathways of pain, combined with AI, stem cell therapies and regenerative biologics will all speak to a future of greater longevity for mankind.
“I think the more attentive we are to the root cause, the more attentive we are to functional pathways – when we start thinking about how the system really works? And we get out of just an algorithmic approach to things.
“We still have quite a ways to go. I think we are making progress. There was a time where we would not be thinking about any of this.
“I think everyone’s excited about what AI will bring. And are we going to be able to make some big steps? I think we’re able to intervene on a genetic level at this point.
“Will we be able to do it well enough to change lifespan? I would guess, yes, but by how much? I don’t know!”
Wellness
Study reveals link between cheese and dementia

A 25-year Swedish study links higher cheese intake to lower Alzheimer’s risk in people without known genetic risk, with cream also tied to lower dementia risk.
However, researchers emphasise that the results should be interpreted with caution.
The study tracked 27,670 people over 25 years.
During that time, 3,208 participants were diagnosed with dementia.
Among individuals without a known genetic risk for Alzheimer’s disease, those who consumed more than 50 grams of full-fat cheese per day showed a 13 to 17 per cent lower risk of developing Alzheimer’s.
This association did not appear in participants who carried genetic risk factors for the disease.
People who consumed more than 20 grams of full-fat cream per day also showed a lower risk of dementia overall, ranging from 16 to 24 per cent.
No meaningful links were found for low-fat or high-fat milk, fermented or non-fermented milk, or low-fat cream.
The results stand out because public health guidance has long encouraged people to choose low-fat dairy to protect heart health.
This connection matters because cardiovascular disease (conditions affecting the heart and blood vessels) and dementia share many underlying risk factors, including high blood pressure, diabetes and obesity.
When evidence from previous studies is combined, analyses suggest that cheese consumption may also be linked to a lower risk of heart disease, and that full-fat dairy does not necessarily increase cardiovascular risk.
Several other studies have explored whether similar patterns apply to brain health, but the results are mixed.
Evidence overall suggests that studies conducted in Asian populations are more likely to report benefits of dairy consumption for cognitive health (the ability to think, remember and reason), while many European studies do not.
One possible explanation is that average dairy intake tends to be much lower in Asian countries, meaning modest consumption may have different effects than higher intakes.
For example, one Japanese study reported a reduced dementia risk among people who ate cheese, but overall consumption levels were very low and the research was sponsored by a cheese producer.
In contrast, another Japanese study funded by government grants found no protective effect of cheese.
Some long-term European studies have also reported benefits.
In a Finnish study of 2,497 middle-aged men followed for 22 years, cheese was the only food associated with a lower dementia risk, reduced by 28 per cent.
Other dietary factors also appear to matter.
Higher consumption of milk and processed red meat was associated with worse performance on cognitive tests, while fish intake was linked to better results.
A large study in the UK that followed nearly 250,000 people found lower dementia risk among those who ate fish two to four times a week, fruit daily and cheese once a week.
However, these studies have important limitations.
What people eat is usually self-reported, and changes in memory can affect both eating habits and how accurately people remember what they have eaten. To deal with this, the Swedish researchers took two extra steps.
First, they excluded anyone who already had dementia when the study began.
Then they repeated the same calculations after removing people who went on to develop dementia within the first ten years of the study.
This did not mean starting the study again or recruiting new participants. It simply meant re-checking the results using a smaller group of people who remained dementia-free for longer.
The reason for doing this is that the early stages of dementia can subtly change behaviour long before diagnosis.
People may eat differently, lose appetite or struggle to recall their usual diet. By focusing on participants who stayed cognitively healthy for many years, the researchers reduced the chance that these early changes were influencing the results.
Another important question is whether substitution played a role.
Some of the apparent benefits may reflect replacing red or processed meat with cheese or cream, rather than an effect of dairy itself.
Supporting this idea, the Swedish study found no association between full-fat dairy and dementia risk among participants whose diets remained stable over five years.
Most importantly, foods should not be considered in isolation.
Dietary patterns matter more than individual ingredients. Diets such as the Mediterranean diet, which is consistently associated with lower risks of both dementia and heart disease, include cheese alongside vegetables, fish, whole grains and fruit.
In the Swedish study, people who consumed more full-fat cheese and cream were also more educated, less likely to be overweight and had lower rates of conditions linked to dementia, including heart disease, stroke, high blood pressure and diabetes.
All of these factors independently reduce dementia risk.
This suggests that higher cheese intake tended to occur within healthier overall lifestyles, rather than alongside excess calorie consumption or poor metabolic health.
Overall, the evidence does not support the idea that full-fat dairy causes dementia, nor that fermented milk products reliably protect against it.
Full-fat cheese contains several nutrients relevant to brain health, including fat-soluble vitamins A, D and K2, as well as vitamin B12, folate, iodine, zinc and selenium.
These nutrients play roles in neurological function and may help support cognitive health.
That said, the data do not justify eating large amounts of cheese or cream as protective foods against dementia or heart disease.
The most consistent message remains that balanced diets, moderation and overall lifestyle matter far more than any single item on the cheese board.
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