Category: Ageing

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Dietary Patterns Linked to Favourable Ageing Biomarkers

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Older adults who follow healthy dietary patterns have blood biomarker levels associated with more favourable biological processes relevant to ageing. This is shown in a study from Karolinska Institutet published in the journal BMC Medicine. The findings may contribute to a better understanding of how dietary habits are related to the body’s ageing processes.

Researchers have long known that diet plays an important role in health later in life, but the biological mechanisms underlying these associations are not yet fully understood. In the current study, researchers cross-sectionally investigated how different dietary patterns are associated with a broad range of blood biomarkers reflecting metabolism, inflammation, vascular health and neurodegenerative processes related to ageing.

The study included 1,769 people aged 60 years and over who participated in the Swedish National Study on Aging and Care in Kungsholmen (SNAC-K). Participants answered questions about their dietary habits over the previous year, and researchers simultaneously analysed 54 different blood biomarkers. 

Three dietary patterns

The researchers examined three dietary patterns that have previously been linked to good health: a Mediterranean-style diet, an index of overall dietary quality, and a measure of the inflammatory potential of the diet. Greater adherence to these dietary patterns was associated with favourable levels of several biomarkers. This included higher folate levels and lower levels of growth differentiation factor 15, which were observed consistently across all three patterns. Additional associations with biomarkers linked to inflammation, metabolism and neurodegenerative processes were specific to individual dietary patterns.

“Our findings suggest that healthy dietary patterns are associated with several biological processes that are important for how we age. This reinforces the view of diet as a modifiable factor that may contribute to healthy ageing,” says Rachel Ann Da Costa, researcher at the Department of Neurobiology, Care Sciences and Society, and first author of the study.

The dietary pattern with lower inflammatory potential showed associations with the greatest number of biomarkers, particularly those linked to inflammation and metabolism. According to the researchers, this may indicate that the inflammatory properties of diet are related to several interconnected biological processes involved in ageing.

More studies needed

As the study examined associations at a single point in time, it cannot establish cause and effect. The researchers also emphasise that participants mainly consisted of older adults from the Stockholm area with relatively high levels of education, which may limit the generalisability of the findings to other populations.

“We now need more longitudinal and intervention studies to investigate whether changes in diet also lead to changes in the biological markers we have studied,” says Adrián Carballo-Casla, researcher at the same department and last author of the study.

The study was conducted in collaboration between researchers at Karolinska Institutet, Stockholm University, KTH Royal Institute of Technology, Stockholm Gerontology Research Center, Universidad Autónoma de Madrid and CIBERESP in Spain, as well as the University of Ljubljana in Slovenia. The study is based on data from SNAC-K. Funding was provided by, among others, the Swedish Research Council, Forte, Karolinska Institutet, the Swedish Alzheimer Foundation, the Dementia Foundation, the Foundation for Geriatric Diseases at Karolinska Institutet, the David and Astrid Hagelén Foundation, and Swedish government departments, regions and municipalities. The researchers report no conflicts of interest.

Three ways of measuring diet quality

Alternative Mediterranean Diet (AMED)

A dietary pattern based on the traditional Mediterranean diet. Higher scores are awarded for a high consumption of vegetables, legumes, fruit, nuts, whole grains and fish. A high proportion of unsaturated fats and moderate alcohol consumption are also scored positively. Lower consumption of red meat and dairy products likewise contributes to a higher score.

Alternative Healthy Eating Index (AHEI)

A scientifically developed index that measures overall diet quality. Higher scores are awarded for foods such as vegetables, fruit, whole grains, legumes, nuts, fish, healthy fats and moderate alcohol consumption. Lower scores are given for high consumption of red and processed meat, sugar-sweetened beverages, trans fats and sodium.

Empirical Dietary Inflammatory Index (EDII)

A measure that estimates how diet influences inflammation in the body. In this study, a reverse version of the index was used, with higher scores corresponding to a diet with lower inflammatory potential. Components such as leafy green and dark yellow vegetables, fruit juices, coffee and tea receive higher scores, while higher consumption of red and processed meat, refined grain products and sugar-sweetened beverages results in lower scores.

Source: Karolinska Institutet

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Healthy Eating Associated with Slower Biological Aging – But No One Diet is Best

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A study by DZNE finds that healthy eating is associated with slower biological aging – and that there is more than one way to eat healthily. The researchers examined ten dietary patterns considered healthy, including the Mediterranean, Nordic, and a plant-based diet, as well as the DASH diet, which is designed to help lower blood pressure. All were linked with slower biological aging, with age-related changes in the DNA serving as markers. These results, based on data from DZNE’s Rhineland Study and confirmed with data from an independent study, are published in the journal Nature Communications. 

“Our study suggests that healthy eating goes hand in hand with slower biological aging. The effects are not massive, but they are measurable and relevant for prevention. By slowing the aging process, the risk of age-related diseases such as dementia or cardiovascular disorders can be reduced. Thus, healthy eating contributes to healthy aging,” says Prof. Monique Breteler, Director of Population Health Sciences at DZNE and head of the Rhineland Study. “Importantly, there is probably no single ‘correct’ diet. According to our data, various dietary patterns are associated with slower aging, some more, some less. That is an encouraging finding, because it leaves room to tailor healthy eating to personal and cultural preferences, budget and taste.” 

Molecular Aging Measures 

For their analysis, the researchers evaluated blood samples and dietary habits from about 7500 women and men: This included 6470 participants of DZNE’s Rhineland Study in Bonn – where the findings were initially made – and 1034 participants of the EPIC-Potsdam Study of the German Institute of Human Nutrition Potsdam-Rehbrücke (DIfE), where the key results were independently confirmed.  

From blood, the team determined chemical modifications in the DNA, known as “DNA methylation patterns”, which influence gene activity and thus biological mechanisms. Since these molecular markers change systematically over the course of life, they are considered indicators of biological aging. 

“We applied three different approaches, so-called epigenetic clocks, to read biological aging from DNA methylation,” explains Juliana Tavares, a doctoral researcher at DZNE and lead author of the current publication. “To this end, we leveraged state-of-the-art technology, which allowed us to cover about 850 000 sites in the DNA. This is roughly twice as many as in most previous studies.” 

Healthy Eating: Different for Everyone 

The researchers also matched every participant’s eating habits against the recommendations of each of the ten diets studied. Adherence was quantified and graded using a scoring system based on how closely individuals followed each dietary pattern. “One and the same person could therefore rank high on one diet score and low on another. In other words: People who ate healthily by one standard were often not the same people who ate healthily by another. According to our data, hardly anyone counts as a healthy eater by every standard at once,” says Tavares. 

However, across the board, higher diet quality was associated with slower biological aging. This applied to all of the ten diets examined. “While there are measurably differences between the diets, they are modest in absolute terms. It’s the big picture what matters,” says Tavares. “In summary: When it comes to slowing down the aging process, there isn’t just one healthy diet, but indeed a whole repertoire of possible diets with a positive effect.”  

One result was particularly noteworthy: the association between diet quality and slower biological aging was most pronounced in smokers, even though smokers were by no means eating healthier than non-smokers. The biological explanation is still open. “Smoking is very harmful to health,” says Tavares, “One explanation for our findings might be that there is just more health benefit to gain for smokers by eating healthy because of the enormous detrimental effects of smoking.” 

Shared Biological Pathways 

Although each dietary pattern was associated with its own distinct set of DNA methylation sites, the biological mechanisms involved showed substantial overlap. “More than 70 percent of the affected biological pathways were shared across all diets. These involve cell structure, cell signalling and metabolism – processes central to aging and chronic disease. Therefore, it is understandable that the dietary patterns we examined were all linked with a slowing of biological aging,” says Tavares. “A few pathways were diet-specific, and they matched each diet’s main objectives: heart-related pathways were unique to the DASH diet, and pathways related to cognition and memory were unique to the so-called MIND diet, which aims to support brain health. You don’t need a perfect diet – that may be the most practical message here. But moving forward, the diet-specific pathways point to future research on targeted dietary interventions. This could be helpful in designing targeted health recommendations.” 

Source: DZNE

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Opinion Piece: South Africans are Bringing Healthcare Home – But are they Doing it Safely?

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By Dianne Boyd – Chief Operating Officer Frail Care at Allmed

Photo by Kampus Production on Pexels

There is a quiet shift happening in homes across South Africa. As the population ages and hospitals grapple with packed wards and immense strain, families are looking closer to home for answers. More seniors are choosing to stay right where they are, surrounded by their own memories, familiar furniture, and beloved pets, rather than moving into frail care or assisted living facilities. At the same time, because hospitals are discharging patients much faster following surgery, strokes, or cancer treatments, expert recovery support right in the living room has never been more important.

For most people, the thought of healing or growing older in a familiar space brings an unmatched sense of comfort and dignity. But for someone navigating the fog of dementia or the daily weight of a chronic illness, holding onto familiar routines is life changing. It reduces anxiety, keeps confusion at bay, and gives patients a deep-seated feeling of control that a clinical institution simply cannot match.

The hidden trap of doing it alone

As the need for home care grows, it becomes easy to see why some families turn to online platforms or informal word-of-mouth recommendations to find help. On the surface, hiring a caregiver directly feels simpler, quicker, and perhaps cheaper. But it often masks a maze of hidden responsibilities and risks that families are rarely prepared for.

Society tends to think of home care as simple companionship or a helping hand with daily tasks. In reality, caring for a vulnerable loved one safely requires a tremendous amount of unseen work. When individuals hire someone independently, they suddenly step into the role of an employer. Managing contracts, payroll, UIF contributions, and leave becomes an immediate reality. Worse still, what happens when a caregiver wakes up sick or resigns unexpectedly? Without a reliable agency behind the household, finding cover at 4am in the morning falls entirely on the family.

Even more concerning are the clinical visibility gaps in such an arrangement. Without professional oversight, missing the subtle early warning signs of trouble is remarkably easy; a tiny pressure sore starting to form, the early stages of dehydration, a missed medication, or a silent infection.

Why professional care changes everything

Treating home-based care as a true healthcare partnership rather than a domestic arrangement completely changes the experience for a family. Reputable, registered providers shoulder the heavy burden of care, so relatives do not have to carry it alone.

Instead of crossing fingers and hoping for the best, a professional approach brings real clinical governance into the home. Experienced clinical facilitators step in to assess patient needs, create tailored daily care plans, and check in regularly. They ensure that caregivers are thoughtfully matched to the individual, such as pairing someone with specialised dementia training with a patient who needs calm, skilled behavioural guidance.

Partnering with an established provider also puts a safety net around the entire household. Professional agencies cover personnel with medical liability insurance while handling all statutory requirements like workmen’s compensation, keeping families legally and financially protected from unforeseen accidents.

Finding peace of mind and financial relief

One of the greatest barriers families face with home care can be the financial weight. This is where working with a registered provider can make a profound difference. Because established agencies hold an official practice number, families can often submit claims directly to their medical aid schemes, subject to scheme rules and a specialist’s clinical motivation. This can be a powerful way to ease the financial strain of long-term support.

Bringing care into the home should bring peace of mind rather than sleepless nights. Leaning on a professional team for the vetting, the legalities, and the clinical oversight allows relatives to step back from being managers and return to being sons, daughters, or partners. That leaves space to focus on what truly matters: sharing meaningful, comfortable moments with a loved one, right where they belong.

Categories : AgeingTags :

Study Identifies Potentially Harmful Drug Combinations Prescribed to Older Adults

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A new Ontario-wide study reveals that common medications, from statins to iron supplements, are quietly setting off prescribing cascades that leave older adults unknowingly taking drugs to treat side effects of other drugs.

The research, published in BMJ and led by Paula Rochon, a clinician scientist at Sinai Health and professor of medicine at the University of Toronto’s Temerty Faculty of Medicine, has revealed that certain drug combinations are a common but unrecognised contributor to drug related harm at the population level and add unnecessary costs to the healthcare system. 

A potentially inappropriate prescribing cascade (PIPC) happens when a medication’s side effect gets mistaken for a new health problem, leading to another prescription that may not have been needed in the first place. One common example flagged in the study involves non-steroidal anti-inflammatory drugs (NSAIDs). Commonly prescribed for pain, these drugs are associated with a rise in blood pressure, which can lead to a new prescription for high blood pressure, rather than a second look at the original pain medication. Older adults are especially vulnerable to this pattern because they’re more likely to be on multiple medications at once, due to having multiple conditions, making it harder for both patients and clinicians to trace a new symptom back to an existing drug.

“These sequences of events are common but often missed in clinical practice,” says Rochon, who serves as the director of research at the Weston and O’Born Centre for Mature Women’s Health at Sinai Health. “Knowing what medications you are taking, when they were started and for what indication is important in order to identify possible prescribing cascades that may be problematic.”

The study brought together an interdisciplinary, international team of collaborators and leaders in drug prescribing and geriatric medicine research from the United States, Belgium, Italy, Israel and Ireland, along with Sinai Health researchers and U of T professors Vasily Giannakeas and Nathan Stall, geriatrician Christina Reppas-Rindlisbacher and research staff Wei Wu and Joyce Li.

With the expertise of 12 international panellists specialising in internal medicine, geriatric medicine and clinical pharmacology, the research team previously created a list of 65 PIPCs. Using this list and population-level prescription data from ICES, Ontario’s health data institute, the researchers examined each PIPC against three factors: how common the initial drug was in the population, how often it was followed by the second drug, and how strong the link was between the two. That analysis allowed them to pinpoint the 24 potentially inappropriate prescribing cascades most commonly seen in the population and with a potential to cause harm.

Seeing the pattern behind every prescription 

For Rochon, the findings highlight a gap that opens quietly, one prescription at a time. “Our concern is that so often these conversations between the health care prescriber and the patient are being missed, so people don’t recognise the sequences of events and that they are connected to one another,” she said.

Closing that gap means physicians need to think about medication history at every visit, not just what a patient is currently taking, but why each drug was started in the first place, and whether the next one was really needed.

The work also carries a particular weight for mature women, as they tend to live with more chronic conditions than men over their lifetime. Mature women are prescribed more drug therapies, and experience more adverse drug events. By being on multiple medications at once, they are more exposed to the risk that a drug’s side effect gets mistaken for a new diagnosis rather than traced back to its source.

The team’s findings point to promising next steps.

The first involves technology. Automated clinical decision support tools could flag a prescribing cascade in real time and prompt a second look before a new prescription is added. This information could be leveraged in one of several automated ways to help clinicians be aware of these potentially inappropriate prescribing cascades at the point of care. 

Next is optimising the role of pharmacists as part of the care team and more directly integrating them into the prescribing process alongside physicians. Their expertise can help identify these potentially inappropriate prescribing cascades for further evaluation.

Original written by Jayda Ayriss

Source: University of Ontario

Categories : Ageing Cardiovascular DiseaseTags :

Statins Cut Heart Attack and Stroke Risk in Older People by 30%

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A world-first clinical trial conducted by Monash University researchers has shown that cholesterol-lowering medication can reduce heart attack and stroke in people aged over 70 years.

Statins are commonly prescribed to manage high cholesterol in people up to 75 years, and are known to reduce the risk of heart attack and stroke. But until now it was unclear whether they were effective in older people.

New research from Monash University, published in the New England Journal of Medicine and presented concurrently at the European Society of Cardiology Congress 2026, found the medication decreases the risk of a first major cardiovascular event by 30 per cent for adults aged over 70 living independently.

The Statins in Reducing Events in the Elderly (STAREE) Trial is the first randomised controlled trial of statin therapy to examine whether the drugs could help in older people who have historically been overlooked in clinical trials.

This landmark, ten-year trial analysed the cardiovascular outcomes of almost 10 000 participants while they took either a statin or placebo.

Lead researcher Adjunct Professor Sophia Zoungas, from the Monash School of Public Health and Preventive Medicine, said the findings will change the way clinicians manage cardiovascular risk in older people.

“What we hope to see, now that we have provided such strong evidence, are updated treatment guidelines to help clinicians make use of this new finding,” Professor Zoungas said.

The global prevalence of cardiovascular disease is expected to almost double from 600 million in 2025 to more than one billion affected adults in 2050. An estimated 2 ,000 older Australians suffer from major cardiovascular events, like heart attack and stroke, each year. The risk increases with age, so people aged over 70 are automatically in a high risk category regardless of lifestyle or other factors.

“The risk of heart attack and stroke is a major concern for older people,” Professor Zoungas said. “Knowing there is a safe and effective measure for lowering that risk will be a huge reassurance to older people and their families.

“Anyone who has seen a loved one impacted by cardiovascular disease will know just how important prevention is.”

Co-author Professor Mark Nelson, a prominent general practitioner, Adjunct Professor at the Monash School of Public Health and Preventive Medicine and Research Fellow at Menzies Institute for Medical Research at the University of Tasmania, said this is critical evidence to support GPs in their decision-making around cardiovascular health in older people.

“This was a particularly important trial because it was conducted in the community, with more than 3400 GPs taking part across Australia,” Professor Nelson said. “In light of this new evidence, older patients should have a conversation with their GP about whether statins are an appropriate treatment for their cardiovascular health to help them remain fit and healthy.”

Read the research paper: http://doi.org/10.1056/NEJMoa2607314

Source: Monash University

Categories : AgeingTags :

In Addition to Healthy Lifestyles, Certain Medications Slow Aging

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When Raghav Sehgal arrived at Yale as a graduate student several years ago, he wanted to explore the use of powerful computer science tools in cancer research. With an engineering background and a computational biology startup already under his belt, he was well prepared.

But as Sehgal began his Ph.D. studies, his thesis adviser at the Yale School of Medicine posed a larger question: If you want to solve cancer or any age-related disease, such as cardiovascular disease, why not solve aging itself? 

“That put me on a different path,” said Sehgal, an associate research scientist in psychiatry with specialties in computational biology and bioinformatics. “As researchers, we have a long way to go in understanding the aging process and whether the steps we take to manage it really work.

What works and what doesn’t

Improved blood-based DNA tests indicate that these interventions seem to be the most effective at slowing the biological aging process:

  •  Prescribed medications for metabolic control and weight management, including metformin and semaglutide.
  •  Healthy diet and exercise combined. Researchers looked at popular diets including, the Mediterranean, low-fat, and low-carb plans.

Additional research is needed to further validate the findings.

Today, Raghav’s research focuses on the biological systems that drive human aging and how to best measure aging, as well as why aging gives rise to diseases like cancer, diabetes, and dementia. And while his research might not necessarily solve aging, he does explore whether the aging process can be reversed through interventions.

Sehgal is the first author of a new paper from the lab of Albert Higgins-Chen, assistant professor of psychiatry in the Yale School of Medicine. In the paper, Higgins-Chen’s research team took a significant step toward determining which existing anti-aging measures have quantifiable impacts.

Using a new class of DNA-based blood tests, they found that lifestyle interventions and certain drug treatments indeed appear to slow the aging process, while over-the-counter supplements don’t have much effect. All members of the Higgins-Chen lab collaborated in the work, including researchers Daniel Borrus, Jenel F. Armstrong, John Gonzalez, Jessica Kasamoto, and Yaroslav Markov. The paper appears in the journal Nature Medicine.

“For the first time we’ve shown that certain therapies have measurable impacts,” said Sehgal. “This wasn’t previously possible, because we didn’t have enough data to say these biomarkers are consistently responsive to these interventions.” Biomarkers are measurable indicators that reflect a person’s functional or biological age rather than just the number of years lived.

For their analysis, the researchers primarily used a type of blood-based biomarker known as epigenetic clocks, which estimate epigenetic or biological age by measuring the pattern of methyl groups (basic chemical structures that act like tags) attached to a person’s DNA. As people age, these chemical tags change, previous research has shown. Successful anti-aging interventions can reverse the tags. Computer algorithms are then able to use the changes observed in these tags to estimate a person’s epigenetic “age.”

In their work, the researchers combined data from 51 anti-aging intervention studies – which examined a range of strategies, from supplements to medical procedures – and measured more than 110 DNA methyl biomarkers (including 16 major epigenetic clocks). They then compared participants’ biological ages before and after various interventions.

“What we did was pretty unique,” Sehgal said. “We already know that certain things might prolong health span and lifespan. There is data from retrospective analysis as well as from animal models. We took all that knowledge along with the real-world clinical studies to identify which interventions in humans were slowing down aging across the board in these known biomarkers.”

The researchers tested four categories of intervention: pharmacological drugs, lifestyle-based changes, over-the-counter supplements, and medical procedures. They found that lifestyle interventions, such as a combination of a healthy diet (whether it’s Mediterranean, low-carb, or low-fat) and exercise, consistently decreased epigenetic age.

Pharmacologic interventions – including metformin and semaglutide, prescription medications used for metabolic control and weight management, and anti-TNF therapies, which use biologic medications to target an immune system protein that triggers harmful inflammation –decreased epigenetic age the most. (TNF, or tumour necrosis factor, is an immune-system protein that helps fight inflammation-related injury.) 

On the other hand, over-the-counter supplements and certain medical procedures didn’t have an effect in decreasing epigenetic age, their analysis showed. Other key findings revealed that the newer biological age clocks outperformed older models, and that biomarkers changed more in people with diseases than in healthy volunteers.

Going forward, the next step would be expanded testing measuring interventions and impact in a widespread, diverse group of volunteers, Sehgal said.

“If these new biomarkers are eventually validated to predict long-term health, scientists will be able to evaluate anti-aging therapies much faster,” he added. “Instead of waiting decades for evidence from clinical trials, we’ll be able to see which interventions are effective and in which people in a few years or even months.”

Senior author Higgins-Chen warned that researchers need to be cautious in interpreting intervention studies. 

“We have developed a rigorous, systematic approach to evaluating and comparing how biomarkers change across a wide variety of interventions, and that is a critical step in the right direction,” he said. “However, the true meaning of that change must be fully understood.”

Which biomarker changes are due to the intervention, and which result from hidden confounders? What is the time course of the change during an intervention – and after the intervention ends? What are the biological mechanisms underlying the change?

“And most importantly – what does the change mean for our long-term risk of age-related disease and functional decline?” Higgins-Chen said. The lab is continuing to investigate these questions in additional studies led by researchers Borrus, Armstrong and Grace Zou. Chen’s lab is also affiliated with the Department of Pathology, the Computational Biology and Bioinformatics Program, and the Y-Age Yale Center for Research on Aging.

Source: Yale University

Categories : Ageing Diet and NutritionTags :

Longer Meal Intervals Linked to Faster Disease Accumulation in Older Adults

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Older adults who typically had longer intervals between meals accumulated chronic diseases more rapidly over time than those with shorter intervals, according to a study from Karolinska Institutet published in the Journal of Internal Medicine. The association was most pronounced among people aged 78 years and older.

Interest in fasting has increased in recent years, but relatively little is known about how meal timing affects health in older adults. In this new study, researchers investigated whether the duration of the longest daily interval between meals was associated with the accumulation of chronic diseases over time. 

The researchers used data from the Swedish National Study on Aging and Care in Kungsholmen (SNAC-K), which includes 2,981 people in Stockholm who were aged 60 years or older at the start of the study. Participants were followed for up to 15 years. The duration of intervals between meals was estimated from participants’ self-reported information about when they typically ate during a 24-hour period. 

Association seen across disease types

Longer intervals between meals were associated with faster accumulation of chronic diseases over time. In particular, people whose longest interval between meals during a typical day was 14 to 24 hours accumulated chronic diseases more rapidly than those whose longest interval was 6 to 11.5 hours. The association was observed for the total number of chronic diseases, as well as for cardiovascular and neuropsychiatric diseases, but not for musculoskeletal diseases. 

“Much of the research on fasting has been conducted in younger or middle-aged populations. Our findings suggest that the associations may be different in older adults, particularly among the oldest age groups”, says Adrián Carballo Casla, last author of the study and postdoctoral researcher at the Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet.

The researchers emphasise that the study cannot determine cause and effect. Although longer intervals between meals were linked to faster disease accumulation, the study cannot establish whether the fasting pattern independently contributed to this outcome.

For information on funding and any potential conflicts of interest, please see the study.

Source: Karolinska Institutet

Categories : Ageing Metabolic DisordersTags :

Waist Circumference Raises Mortality Risk in Elderly – Regardless of BMI

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In a Journal of the American Geriatrics Society analysis of nationally representative data from 6905 US adults aged 65 or older followed between 2011–2024, higher body mass index (BMI) was associated with lower mortality risk, whereas higher waist circumference, a marker of abdominal obesity, was independently associated with higher mortality risk after accounting for BMI.

Compared with normal weight, overweight males and males with class I and II obesity (BMI of 30 to less than 40 kg/m2) had 46% and 51% lower risks of mortality, respectively. Additionally, a high waist circumference was also associated with a 24% higher mortality risk in males. Similar patterns were observed in females.

When BMI and waist circumference were evaluated together, being overweight was associated with lower mortality risk regardless of waist circumference among males. Class I and II obesity also remined associated with lower mortality risk exclusively among males with elevated waist circumference. In contrast, being underweight, regardless of waist circumference, and having normal BMI with elevated waist circumference were both associated with higher mortality risk in both males and females.

“BMI and waist circumference provide complementary information about health risk in older adults,” said study co-author, Bryan Blissmer, PhD, of the University of Rhode Island. “Our findings suggest that considering both measures together, rather than relying on BMI alone, may improve mortality risk assessment and support more informed clinical decision-making.”

Source: Wiley

Categories : AgeingTags :

High-dose Vitamin D May Improve Cognition Among Those at Risk of Dementia

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New Emory University research suggests that higher vitamin D supplement intake may be associated with better cognitive function in adults with an elevated risk of dementia.

In a study of 54 adults with sleep disturbances and mild cognitive impairments (MCI), two hallmarks of early dementia, participants taking at least 5000 IU of vitamin D daily showed better cognitive function compared to those who didn’t.

The study, recently published in Sleep Medicine, found that participants who reported taking 5000 IU or more of vitamin D daily scored more than 13% higher on the Montreal Cognitive Assessment (MoCA) than those who didn’t, even after accounting for other factors. A screening tool to detect risk of developing dementia, MoCA is widely used to assess memory and thinking skills. In this study, lower daily doses of vitamin D were not associated with higher cognitive scores.

The study also emphasises the significance of timing. MCI is an intermediate stage between normal cognitive aging and dementia. 

“In older adults experiencing both sleep disturbance and mild cognitive impairment, this may represent a critical window for intervention, when cognitive changes are emerging, but opportunities to support brain health may remain,” says Victoria Pak, senior author of the study.

“Identifying accessible and modifiable factors, such as vitamin D supplement intake, during the earlier stages of cognitive decline may become increasingly important, particularly as rates of Alzheimer’s disease continue to rise,” adds Pak, associate professor at Emory University’s Nell Hodgson Woodruff School of Nursing.

In addition to the timing of the intervention, the study also found that cognitive performance did not differ based on the form of vitamin D – D2, typically derived from plants or fungi, or D3, produced after sun exposure or consuming animal-based foods.

Vitamin D, an essential nutrient, is not only necessary for muscle and nerve function, but also influences sleep quality and sleep-wake cycles. Additionally, 50% of those with moderate to severe Alzheimer’s disease report having sleep disturbances, indicating a bidirectional relationship between sleep deprivation and cognitive decline. 

While vitamin D deficiencies have been implicated in sleep disorders, such as insomnia and more nighttime awakenings, this preliminary study is the first to assess the relationship between vitamin D supplement intake and cognitive function in a high-risk population with both MCI and sleep disturbances. 

Source: Emory University

Categories : Ageing Neurodegenerative DiseasesTags :

Lower Dementia Risk Seen with Oestrogen-only Hormone Therapy

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Use of hormone therapy later in life was associated with a lower risk of developing dementia, according to a study published August 12, 2026, in Neurology®, the medical journal of the American Academy of Neurology. The study does not prove that hormone therapy prevents dementia; it only shows an association.

“While these findings help us better understand the relationship between hormone therapy use and various markers of dementia, more research needs to be done before we can make recommendations to women about their use of these therapies in relation to their brain health,” said study author Jennifer Bruno, PhD, of Stanford Medicine in Stanford, California. “This study looked back at women who were using hormone therapy decades ago with the timing and type of use differing from what is current practice for most women today, so the results are informative, but they may not apply to today’s standards.”  

For the study, researchers examined medical records from two large data sets. In total, the study reports data from 21 462 female participants from both groups who had clinical tests taken while they were living. A total of 728 participants from one data set completed brain scans or biomarker tests while they were living and 2959 participants from the other data set had autopsies after death, at an average age of 82, to look for signs of Alzheimer’s disease. Across both data sets, participants were followed for approximately three to five years, starting at an average age 71. 

Of the total participants, 1953 participants took hormone therapy and 19 509 participants did not take hormone therapy. Those who used hormone therapy started using it when they were over age 70, on average. The researchers looked only at participants who took oestrogen-only therapy, since previous studies had indicated that oestrogen plus progestin combination therapy may increase the risk of dementia. In current standard practice, oestrogen-only therapy is prescribed only for those who have undergone a hysterectomy due to the risk of endometrial cancer.

Among the group with autopsy information available, participants who had taken hormone therapy were less likely to have signs of Alzheimer’s disease in their brains than those who had not taken hormone therapy. The autopsy assessment used a composite score that measures three hallmarks of Alzheimer’s disease: amyloid-beta plaques, tau tangles and neuritic plaques, which are amyloid plaques surrounded by damaged nerve cells.

Of those who had taken hormone therapy, 18% had no signs of Alzheimer’s disease in their brains at autopsy, compared to 10% of those who had not taken the therapy, and 40% of hormone therapy users had all three signs of Alzheimer’s disease, compared to 51% of those who had not taken the therapy. After adjusting for age, education, genetics, race and hypertension, researchers found that participants who took hormone therapy had 35% lower odds of signs of Alzheimer’s disease at autopsy when compared to those who did not take hormone therapy.  

In a separate analysis using biomarker tests performed when women were living, those who used hormone therapy had levels of amyloid biomarkers in their blood and spinal fluid that indicated less amyloid buildup in the brain compared to women who did not take hormone therapy. Specifically, higher levels of amyloid-beta protein in blood and spinal fluid suggest that less of this protein was being deposited as plaques in the brain.

Finally, use of hormone therapy was also associated with 39% lower odds of receiving a clinical diagnosis of dementia and less risk of showing symptoms of memory problems or decline in functional abilities.

Bruno noted that the study participants who used hormone therapy had an average age of 70, which differs from current standard practice of starting hormone therapy usually in the late 40s to early 50s and stopping it before age 60.

“Despite these limitations, our findings provide evidence of an association between use of oestrogen-only hormone therapy during later life and better outcomes on dementia and brain health,” Bruno said.

Source: American Academy of Neurology