Unlocking the secrets of our fat: New study uncovers how genetics acts through fat tissue to shape health and disease 

9th January 2025 – by Aaruthy Suthahar

A new study has revealed how our genes influence fat tissue and its role in health. Researchers from TwinsUK and their collaborators have created AdipoExpress, the largest-ever analysis of gene activity in fat tissue, using samples from over 2,300 people, including our TwinsUK participants. The findings could help explain why some people are more likely to develop conditions like type 2 diabetes and obesity and point the way to new treatments. 

What Makes Fat So Important? 

Fat, or adipose tissue, isn’t just for storing energy. It’s a busy organ that produces hormones, controls metabolism, and even helps manage inflammation. When fat doesn’t work properly, it can lead to serious health problems like diabetes and heart disease. This study focused on subcutaneous fat (the kind found under the skin) because it’s easier to collect samples from volunteers. 

Key Findings 

  1. Mapping the Genetics of Fat: The researchers identified nearly 35,000 genetic signals that influence how genes work in fat tissue. This is more than twice as many as found in previous studies and shows how complex the genetic control of fat really is. 
  1. New Genetic Insights: Many of these signals weren’t in the main gene control regions (called promoters). Instead, they were further away, acting more like distant dimmer switches. These signals often fine-tune the activity level of a gene rather than simply turning it on or off. Despite their subtle effects, they frequently influence genes that play important roles in health. 
  1. Linking Genes to Diseases: By combining their findings with data from previous studies on health and disease (called genome-wide association studies or GWAS), the researchers identified over 1,800 genes that might affect traits like body fat distribution and diabetes risk. Including these additional genetic signals uncovered 46% more connections to disease than looking at primary signals alone. 

Why This Matters 

The researchers say this work highlights the importance of studying fat tissue to understand health and disease. Combining genetic studies like GWAS with RNA analysis – studying which genes are turned on or off in tissues- helps pinpoint the genes and tissues involved in diseases.

Adipose tissue plays a key role in managing metabolic health, and this study offers the largest map yet of how genetics controls its function. This has led to new discoveries about type 2 diabetes and how body fat is distributed – discoveries that weren’t possible before. 

The researchers also point out how genetic control of gene activity in adipose tissue underlies how men and women store fat differently, and this can affect health in distinct ways. Our upcoming study, AdiProPlus,  will specifically look at these differences where we will collect fat biopsies with a new focus on both male and female volunteers. 

Next Steps 

The findings from AdipoExpress are now publicly available here, allowing scientists around the world to use the data for further research. This open approach will speed up discoveries and help uncover how our genes shape our health. 

Our Research on X Chromosome Inactivation in Lupus Receives Featured Review in Nature Reviews Rheumatology 

1st October 2024 – by Aaruthy Suthahar

We are excited to share that our study on X chromosome inactivation in systemic lupus erythematosus (SLE), led by Dr. Amy Roberts and her team, has been highlighted in Nature Reviews Rheumatology. The article, titled “Is X chromosome inactivation a cause or effect of SLE?”, shines a spotlight on the key findings from our study, which challenge long-standing assumptions about the role of X chromosome inactivation (XCI) in lupus. 

The study, recently published in the Annals of the Rheumatic Diseases, dives into the mechanisms behind the female bias in autoimmune diseases, specifically SLE. Historically, it has been believed that skewed XCI—where one X chromosome is preferentially inactivated—might be a contributing factor to the higher prevalence of lupus in women. However, our study suggests that rather than being a cause, reduced XCI skewing may be a consequence of the disease itself. 

Using a large cohort of women with lupus, alongside a twin study, Dr. Roberts and her team found that lupus patients, particularly those with more severe forms of the disease, showed less skewed X chromosome inactivation compared to healthy participants. This finding was not only statistically powerful but also calls into question existing theories about how XCI contributes to the development of lupus. 

This recognition from Nature Reviews Rheumatology signifies the importance and impact of this work. By pushing the boundaries of what we know about lupus and X chromosome inactivation, this research opens new questions and avenues for future exploration into autoimmune diseases. We are incredibly proud of Dr. Roberts and her team for their continued dedication to advancing our understanding of these complex conditions. 

Congratulations to everyone involved in this exciting achievement! You can read the full review in Nature Reviews Rheumatology here

New Insights into How Our Genes Affect Skin Health 

Thursday 26th September – by Aaruthy Suthahar

A recent study has explored how our genes influence the way our skin’s DNA is chemically marked – a process known as DNA methylation. This discovery could help us better understand various skin conditions and how we age. 

DNA methylation involves adding chemical tags to our DNA that can turn genes on or off. It’s known that these chemical tags can be affected by both our environment and our genes. Previous research mainly focused on blood samples, showing that a significant portion of DNA markers in our blood is due to our genetic makeup. 

However, skin plays a crucial role in protecting us from harm and regulating our body. Changes in skin DNA methylation have been linked to issues like melanoma (a type of skin cancer), the number of moles, and signs of aging. While past studies have looked at these changes in specific skin cells and cancer cells, there hasn’t been a comprehensive study of the entire skin’s DNA. 

The latest research, using data from TwinsUK, has filled this gap. Scientists studied the DNA and gene activity of 414 female twins to understand how genetic factors influence skin DNA methylation. They found that the influence of genes on skin DNA is less than in other tissues, with an average genetic contribution of 10.02%.  

The researchers found thousands of genetic variations that affect how DNA methylation occurs in the skin. These variations also influence gene activity, which could have implications for understanding skin health and diseases. For instance, they identified specific genetic markers linked to conditions like melanoma and psoriasis, as well as markers associated with ageing. 

These findings reveal that our genes play a significant role in how our skin responds to various factors, including aging and disease. This research not only enhances our understanding of skin health but also opens up possibilities for new treatments based on these genetic insights. 

For more details, you can read the full article here

Study Sheds Light on the Role of X Chromosome Inactivation in Lupus 

31st July 2024 – by Aaruthy Suthahar

Researchers at TwinsUK have conducted a study examining the role of the X chromosome in systemic lupus erythematosus (lupus), an autoimmune disease that predominantly affects females. The study, involving nearly 1,000 female participants, found significant differences in X Chromosome Inactivation (XCI) between lupus patients and healthy controls. 

Lupus is a condition where the immune system attacks the body’s tissues, leading to inflammation and damage. Despite extensive research, the reasons why 90% of lupus patients are female remain unclear. One theory suggests that the sex chromosomes, particularly the X chromosome, may play a role. 

In females, one of the two X chromosomes is randomly inactivated in each cell, a process known as XCI. This study measured changes in XCI in immune cells and discovered that only 7% of lupus patients showed changes in XCI, compared to 30% typically seen in healthy females. Moreover, among those with more severe lupus, only 3% exhibited changes in XCI. 

To further validate these findings, researchers studied twin pairs from TwinsUK where one twin had lupus, and the other did not. The results were consistent: twins with lupus had fewer changes in XCI than their healthy counterparts. 

Interestingly, these findings differ from previous research on other autoimmune diseases such as thyroid disease and rheumatoid arthritis, indicating distinct mechanisms underlying different autoimmune conditions. Instead of a broad pattern of XCI changes, the study found a correlation between XCI and the “interferon signature,” a marker of lupus disease activity. 

These insights suggest that the role of XCI in lupus is unique and may not follow the patterns observed in other autoimmune diseases. More research is needed to understand how these changes in XCI affect immune function and their implications for infection defence, especially as individuals age. 

First author Dr. Amy Roberts explained:   

“Thanks to the TwinsUK volunteers, we were able to demonstrate differences in X chromosome inactivation between healthy controls and people with lupus. Not only does this research help us understand lupus but also how our immune system changes with age – an area we are actively researching further.” 

This study represents a significant step forward in understanding the complex biology of lupus and underscores the importance of examining sex-specific factors in autoimmune diseases. 

We spoke to TwinsUK researcher Dr Emily Leeming about her new book “Genius Gut: The Life-Changing Science of Eating for Your Second Brain” 

17th July 2024 – by TwinsUK

What inspired you to write “Genius Gut”?  

I wanted to share that what you eat can affect how you feel right now – how mentally sharp you feel, your mood, and how energetic you are. For too long the brain has been thought as separate to the rest of the body, and that’s not the case at all. And the gut has been hugely overlooked, it does so much more than just digest your food – it’s your second brain. It’s highly complex, containing its own nervous system, with more nerve cells than there are in your spinal cord. And its home to your gut microbiome, that can signal to your brain.

What is Genius Gut? 

Genius Gut is a book for everyone – if you have a gut and a brain, then this book is for you! It’s an easy guide to the science of the gut-brain connection, and our latest understanding of how gut microbes signal to the brain influencing mood, cognition and behaviour. There are ten simple hacks on how and what to eat for your gut bacteria, brainpower and to feel your best, packed with actionable tips and advice based on my research in nutrition and the microbiome at King’s College London, and as a registered dietitian. 

Can you explain the connection between our gut and brain in simple terms? 

It’s the science behind the phrases “gut feelings” and “I’ve got butterflies in my stomach”. For too long we’ve thought of the gut as only a food factory, when in fact it’s intimately connected with the CEO of your body – your brain. Your gut and your brain are physically connected through your vagus nerve, a long wandering nerve that reaches down from your brain to your upper body, including your gut. And your gut microbes can signal to your brain, through your vagus nerve, but also via metabolites, hormones and the immune system.  

What are some common misconceptions about the gut-brain connection that your book addresses? 

I wanted to highlight in Genius Gut how connected the brain and the gut really are. We talk about mental health and physical health as if they are two separate things. But we’re now understanding that many conditions and diseases of the mind can start in the gut or can be influenced by what we eat. Up to 80% of people with Parkinson’s disease also have constipation, that can appear as much as 20 years before movement and cognitive symptoms. In Alzheimer’s disease there’s a harmful build-up of mis-folding proteins in the brain, and there’s now early evidence in mice that these proteins could start in the gut first. You’re six times more likely to get Alzheimer’s disease if you have inflammatory bowel disease. And if you have irritable bowel syndrome, you’re significantly more likely to have anxiety and depression.  

How does the gut microbiome influence our mental health? 

Many people online claim that “90% of your feel-good serotonin is made in your gut”. While it’s true that 90% of serotonin is produced in the gut, this serotonin primarily helps with your digestion and it’s too large a molecule to pass through your blood-brain barrier to your brain. However, your gut bacteria do play an important role in helping your brain access the building blocks needed to produce your feelgood serotonin, as these smaller molecules can pass through the blood-brain barrier, for your brain to make serotonin itself.  

How does the gut microbiome influence our cognition? 

What microbes you have matters for your brain and cognition. For example, babies born via C-section initially receive their first batch of microbes from the hospital environment rather than from their mother. However, when these babies were given some of their mother’s vaginal microbiome for their guts, they had significantly better neurodevelopment at six months old than other c-section babies.  

Gut bacteria are linked to differences in the size of the hippocampus, memory and cognitive skills throughout childhood and adolescence, with the brain continuing to develop up until 25 years old. Microbes matter later in life as well, helping to lower excess inflammation that can damage the brain. In aging mice, a microbiome transplant from their more youthful counterparts improved memory and reversed signs of brain aging. Research from our department of Twins Research has also highlighted this connection between microbes and cognition. Colleagues found that a prebiotic fibre supplement, which feeds your ‘good’ gut bacteria, improved performance in memory tests in just three months. 

How has your personal journey influenced the insights and solutions offered in “Genius Gut”? 

What many people don’t know about me is that I spent the first part of my career as a private chef. So it’s important to me that food is delicious, and that there’s room for the occasional cake or chocolate too. I strongly believe we need to recognise the joy that food brings – and that how we think about food matters too – do you beat yourself up for enjoying a slice of cake, or do you savour it and move on? When we talk about the gut-brain connection we aren’t only talking about the gut talking to the brain, but also how the brain talks to the gut; how stress and mood can affect your food choices, your digestion, and your microbes. Healthy eating for your gut-brain connection is about balance. 

Dr Emily Leeming, Registered Dietitian and Research Fellow at Department of Twins Research and Genetic Epidemiology, King’s College London.  

Dr Emily’s book, Genius Gut: The Life-Changing Science of Eating for your Second Brain is available to buy now.  

You can also subscribe to her free weekly newsletter on Substack, called Second Brain 

Socials: @dremilyleeming 

Researchers challenge focus on rural older adults in Chris Whitty’s latest health report 

Tuesday 4th June – by Aaruthy Suthahar

In a report published this week in Clinical Medicine, researchers from the Centre for Ageing Resilience in a Changing Environment (CARICE) show that contrary to that suggested in Chris Whitty’s latest annual Chief Medical Officer (CMO) report for England, most older adults live in urban areas rather than rural areas. Adding in self-reported health as a measure of need for services, a more complex picture of ageing demographics emerged, suggesting a need for a nuanced understanding when planning healthcare services and resource allocation.

According to Nathan Cheetham, Senior Postdoctoral Data Scientist: 

“Chris Whitty’s latest report as Chief Medical Officer highlights the importance of understanding the geography of ageing in England. However, it’s crucial to consider both absolute and relative population metrics for a comprehensive view.” 

Census 2021 data indicates that approximately three-quarters of older adults in England and Wales, equivalent to 8.4 million individuals, live in urban regions. This challenges the emphasis placed on rural and coastal areas in the CMO report. 

Professor Claire J. Steves, specialising in Ageing and Health, emphasises: 

“We need to move beyond simplistic rural-urban dichotomies when planning healthcare services. The absolute numbers and health needs of older adults in urban areas demand attention. This is particularly important as we experience more climate change-related heat waves which mostly affect urban hotspots. Older people living in such places also tend to be more vulnerable.”   

“This is particularly important as we experience more climate change-related heat waves which mostly affect urban hotspots.  Older people living in such places are the most vulnerable group.”

Projected population growth further complicates assumptions about urban-rural dynamics. Rather than shrinking, urban areas are projected to experience significant growth in older populations over the next two decades, with a projected increase of 43% compared to 48% in rural areas by 2043. 

Disparities in health outcomes underscore the need for subtle policy responses, urban-dwelling older adults are not only more numerous but also more likely to reside in deprived neighbourhoods and report poorer health compared to their rural counterparts.

Investing in preventive measures and understanding the diverse needs of older adults across different geographical areas is imperative for ensuring equitable healthcare provision.   

As policymakers navigate the evolving landscape of ageing demographics, a comprehensive approach considering both absolute numbers and health indicators is vital for effectively addressing the healthcare needs of older adults in England. 

Study Reveals ZOE Personalised Diets Yield Health Improvements 

9th May 2024 – by Aaruthy Suthahar

In a recent study published in the scientific journal Nature Medicine, researchers from ZOE, who are running the largest in-depth nutrition study in the world, examined the impact of personalised dietary advice versus general recommendations on cardiometabolic health. This study, involving 347 participants aged 41 to 70 years, sheds light on the effectiveness of tailored dietary programmes. 

Participants were randomly assigned to either receive personalised dietary guidance by ZOE or standard care advice based on the US Department of Agriculture Guidelines for Americans. The personalised dietary programme utilised various factors including food characteristics, individual responses to food, microbiomes, and health history to create personalised food scores over an 18-week period. 

Results showed a significant reduction in triglyceride levels, which are types of fat in the blood, among participants following the personalised dietary programme compared to those receiving standard advice. However, there were no significant changes in low-density lipoprotein cholesterol. Additionally, improvements were noted in other measures such as body weight, waist circumference, HbA1c levels (which is a measure of blood sugar over time), diet quality, and the variety of gut bacteria, particularly among participants who closely followed the personalised programme. 

It is noteworthy that participants following the ZOE programme reported feeling better, with improvements in mood, reduced hunger, better sleep, and increased energy compared to the control group. Those who closely adhered to the ZOE advice also experienced greater improvements in weight and increases in diet quality, associated with lower risk for heart disease and diabetes. 

Overall, the study shows the potential benefits of personalised dietary advice in improving cardiometabolic health outcomes, providing valuable insights for individuals seeking effective dietary interventions. TwinsUK members were instrumental in enabling ZOE to develop their personalised dietary programme through the original research study on personalised diets, PREDICT.  

New Study Reveals Epigenetic Markers for Type 2 Diabetes Complications in Identical Twins 

23rd April 2024 – by Aaruthy Suthahar

A recent collaborative effort among seven international twin cohorts, including TwinsUK, has yielded new epigenetic (molecular) markers of type 2 diabetes and potentially its complications. The paper, published in eBiomedicine, sheds light on distinct blood markers in identical twins, where one twin was diagnosed with type 2 diabetes while the other remained unaffected. 

Type 2 diabetes is a condition where the body struggles to regulate blood sugar levels effectively. Over time, this can lead to serious health complications like heart disease, kidney problems, and vision impairment. Identical twins, who share the same genetic blueprint, offer a unique opportunity to explore why one twin might develop diabetes and its complications, while the other remains healthy. 

The study, led by a team of researchers at TwinsUK, delved into epigenetic markers—alterations to DNA that regulate gene activity and are influenced by genetic changes, lifestyle factors, and environmental exposures. By examining identical twins discordant for type 2 diabetes across various cohorts, the researchers aimed to pinpoint novel epigenetic changes indicative of diabetes. 

Among the notable findings were the identification of new blood epigenetic markers that distinguish twins with diabetes from their unaffected counterparts. Notably, these newly identified changes were found to be located within genes linked to complications of diabetes, like eye problems and high blood pressure. Additionally, the study also validated previously detected signals associated with diabetes. 

In summary, leveraging the unique genetic makeup of identical twins allowed the research team to uncover promising epigenetic markers of type 2 diabetes, that are also potentially indicative of the development of diabetes complications. This collaborative effort shows the power of the twin study approach in unravelling complex disease mechanisms and offers valuable insights for future research and clinical applications. 

The detailed findings of the study can be accessed in eBiomedicine via the following link HERE.

Celebrating International Women’s Day: Stories from Twins and TwinsUK Staff

25th March 2024 – by Aaruthy Suthahar

International Women’s Day (IWD) on March 8th is a day to celebrate the achievements and contributions of women globally. At TwinsUK, this year’s IWD was marked with heartfelt stories and reflections from both twins and staff members, showcasing the resilience, strength, and camaraderie that defines the twin community and the workplace culture at TwinsUK.

Twin Stories

Sue, reflected on her late twin sister Jill’s impactful work:

IWD meant nothing to me, but it did to my twin, best known as Jill Saward. Before her death in 2017, she worked tirelessly for women who’d been subjected to Rape or sexual abuse, and victims/survivors of domestic abuse. As identical twins it sometimes made life difficult. People felt through her work they knew me, but also total strangers would ask me how she was. Her impact really hit me after her death. Her friends and campaigners became my friends too – all women.

Francina and Vanessa, facing the daunting challenge of breast cancer, found strength in their twin connection.

We are facing one of our biggest challenges this international women’s day year as identical female twins with one of us being diagnosed with breast cancer. Having a mastectomy and facing chemotherapy all I could think about was how different I would look to my twin. We even joked about Vanessa wearing a head scarf when we go out as we love the “ are you twin” comments . We are both clinicians and Christian’s giving us resilience and the ability to face challenges head on. Vanessa has been a constant support and we are celebrating that the genetic test came back negative , reducing my twins risk of having breast cancer. I feel safe knowing my twin is there and am so grateful for my older sister as well. My prognosis is good so looking forward to beating my cancer and getting back to “double trouble“ outings with my twin.

Laura and Jill celebrated not only their twinship but also the joy of raising twin girls themselves:

In honour of International Women’s Day I’m celebrating my amazing identical twin sister Jill who herself has identical twin girls, Aurora ‘Rory’ and Clara – they recently turned 18 months old! They are the coolest and funniest girls on the planet and I watch them with absolute fascination. It is mine and my twin’s duty to set the best example to them of how lucky it is to be a twin and to celebrate it! In the photo, completely unplanned, we are all coordinating tops and bottoms (as are the front doors in the houses behind us).

Margaret and Barbara honored their mother’s legacy, recognising the sacrifices she made in raising them as twins.

I would like to celebrate mothers of twins! Our mother never grew tired of telling the story of how she had the surprise of her life when she was told there’s another baby after I was born. It can’t have been easy bringing up twins in the 1960’s and we only really appreciated this when my son and his fiance became the parents of twins in 2022! Watching them cope with tiny twins night and day has raised so many questions about our own early years. Sadly, we are not able to ask our mum about it as she passed in 2020. The photo attached was taken on her last Mother’s Day, during lockdown when we could not bear to leave her alone all day. Barbara and I will be forever grateful for everything she did for us.

Thoughts from TwinsUK staff

Aaruthy, Communications and Engagement Officer:

Working in the field of science research not only as a woman but also a woman of colour comes with its own set of challenges and opportunities due to lingering stereotypes and biases globally. Yet, at TwinsUK, as someone who is a woman of colour, I’ve had the privilege of experiencing a workplace where diversity and inclusion is embraced. Most of the staff in our department are women from all different backgrounds and each with their own talents and perspectives. I am truly inspired by the women I work with as we collaborate, support each other, and celebrate each other’s successes. I remain hopeful for a future where every woman, regardless of background, can thrive and succeed in the scientific research community.

Bridget, Senior Research Nurse at TwinsUK:

I’ve dedicated the majority of my nursing career to the fields of hematology, oncology, and palliative care, where I’ve been surrounded by compassionate and incredible women. Nursing is undeniably women-centric. My journey led me to TwinsUK, where I gained a glimpse into the world of science, and I’ve cherished every minute of it. Being surrounded by so many intelligent and supportive women from diverse backgrounds has been truly inspiring. Our department is led by fantastic women who wear multiple hats – they’re researchers, clinicians, leaders, and mothers all rolled into one. While there’s still some lingering gender bias in the scientific realm, I remain optimistic that we are making strides in the right direction, one step at a time.

Ayrun, Clinical Operations Manager at TwinsUK:

After my studies, I went from a laboratory assistant to the role of clinical operations manager within my department. Along this journey, I also welcomed two babies, which naturally brought challenges of balancing work with raising young children. However, being part of an inclusive and supportive department where you are made to feel secure makes navigating these challenges easier. What does International Women’s Day mean to me? It means celebrating women’s achievements and contributions- you only need to look at the remarkable women within our department! Equally, it reminds us to recognise the ongoing challenges women still face globally. It is also a day to promote solidarity, to empower, inspire, and uplift women of future generations.

Gulsah, Resource Admin Manager at TwinsUK:

Through my studies of Social sciences from secondary to University years, I was always made hyper-aware of the gender gaps that were statistical facts within our society but admit I had internalised these on some level. As a young, second-generation immigrant female, I did not have the confidence to break these barriers – which was until I started working for the Department of Twin Research. Being surrounded by incredibly successful women from all kinds of backgrounds and walks of life changed my perspective entirely which ignited a new level of ambition in me. As the new Resource Admin Manager, and also a recent first-time mother, I am inspired daily by my remarkable colleagues (both professionally and personally) and couldn’t be prouder to be a woman in science celebrating International Women’s Day here at TwinsUK.

As we reflect on the stories shared by twins and TwinsUK staff, one thing becomes clear: the essence of International Women’s Day extends beyond a single day of celebration. It’s about honouring the past, celebrating the present, and advocating for a future where every woman, regardless of background or circumstance, can thrive. Whether it’s through sisterhood, solidarity, or mentorship, the spirit of IWD lives on in the collective efforts of women everywhere. At TwinsUK, it’s a spirit that continues to inspire and empower each and every day.

Daily fibre supplement improves older adults’ brain function in just 12 weeks

29th February 2024 – By Aaruthy Suthahar

Researcher’s from TwinsUK conducted a study on twins aged 60 and above which has shed light on the intriguing connection between gut health and cognitive function.   

As populations age globally, the prevalence of age-related conditions such as muscle loss and cognitive decline is on the rise. Recognising the importance of addressing these issues, researchers at TwinsUK investigated how targeting the gut microbiota, the diverse community of microorganisms residing in our intestines, using a cheap, commercially available prebiotic supplement, could impact both muscle health and cognitive abilities as we age.

In a meticulously designed trial involving 36 twin pairs (72 individuals), participants were randomly assigned to receive either a placebo or a prebiotic supplement daily for 12 weeks. Alongside this, all participants engaged in resistance exercises and received a protein supplement, aimed at improving muscle function.

Using innovative remote methods including video visits, online questionnaires, and cognitive testing, researchers tracked the participants’ progress throughout the trial. Notably, the prebiotic supplement led to significant changes in the participants’ gut microbiome composition, particularly an increase in the numbers of beneficial bacteria such as Bifidobacterium.

The study found no significant difference in muscle strength between the group receiving the prebiotic and those taking the placebo. However, participants who received the prebiotic demonstrated improved cognitive function compared to those getting placebo. This finding demonstrates a link between gut microbiome health and brain function in older adults.

First author Dr. Mary Ni Lochlainn said:

“Our results demonstrate that inexpensive and easily accessible interventions targeting the gut microbiome can improve cognition in older adults, halving the number of errors on a memory test. This holds huge promise for enhancing brain health and memory in our ageing population.”

Senior author Professor Claire Steves, Professor of Ageing and Health said: 

“The importance of this research is that these plant fibres are cheap and already over-the counter and therefore could benefit a wider group of people in these cash-strapped times. They are safe and generally well-tolerated.  Our next task is to see whether these effects are sustained over longer periods and in larger groups of people.” 

The study’s remote design proved successful, demonstrating the feasibility of conducting trials in older adults without the need for extensive travel or hospital visits. Challenges such as digital literacy and access to the necessary technology were acknowledged and will be addressed in future research.

While the study focused on older adults, its implications extend to broader research aimed at understanding the intricate relationship between gut health, physical function, and cognitive abilities across different age groups. As the population continues to age globally, unlocking the secrets of the gut-brain axis could offer novel strategies for promoting healthy ageing and combating age-related cognitive decline.

The findings of this study pave the way for larger-scale trials investigating the potential of gut microbiome interventions to improve muscle health and cognitive function in older adults. Could the gut microbiome represent a key target for a whole range of age-related declines, helping to keep older people independent? By addressing these critical health challenges, researchers aim to enhance the quality of life for ageing populations worldwide.

This study was supported by King’s Centre for Ageing Resilience in a Changing Environment (CARICE) and by grants from the National Institute of Health Research and Wellcome Trust. 

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