Is AI coming for your creative job? Maybe not – with some human intervention

Source: The Conversation – Canada – By Afsoon Soudi, Assistant Professor, RTA school of Media, Toronto Metropolitan University

The AI robot, Ai-Da, at a United Nations summit with its paintings, which sold for US$1 million. 2025 © Ai-Da Robot Studios

Many writers, actors and other creatives are currently experiencing a small wave of panic about artificial intelligence (AI) taking over their jobs.

Generative AI (GenAI) is making machine learning and creative work more accessible to everyone. But for industry professionals, the rise of generative AI can signal the destruction of creative jobs.

Yet, according to a recent report by the World Economic Forum, AI will create more jobs in the next five years than it will displace.

We are four scholars in different creative industries hoping to explore educational approaches to AI. We want to help prepare the next generation to innovate within human-AI collaborative frameworks. To do this, we have begun to confer with other creative professionals through an online survey.

What if AI can actually support human creativity and productivity? Can we use these technologies to our advantage? What we can expect for the future?

We believe creative professionals can harness new technologies while still upholding their foundational creative and ethical principles.

How AI is being used in creative sectors

AI is becoming deeply embedded within the operational workflows of creative industries, from a nascent concept to an integrated reality.

Media and creative workers have gone on strike to protest the use of AI, sparking important conversations. For example, Screenwriters in Hollywood and the Writers’ Union of Canada have raised concerns and helped shape new policies around AI and creative work.

Within media production, large language models (LLMs) can facilitate the rapid prototyping of narrative concepts, scripts and audiovisual materials, while automated editing platforms and AI-driven visual effects create massive efficiency gains in post-production. This technological integration allows creators to shift their focus from laborious manual tasks to higher-level creative refinement.

In graphic communication and packaging, AI and machine learning are acknowledged drivers of change. AI can enhance processes from ideation to production logistics like sorting and personalized web-to-print platforms. In the realm of Digital Asset Management, AI is instrumental in improving asset discoverability and utility through automated metadata tagging and sophisticated image recognition.

Journalism is also undergoing a significant transformation. AI has been used for a while now to analyze large datasets for investigative reporting, but LLMs now routinely streamline article summarization. More advanced applications are emerging: AI systems are designed to identify news values and auto-generate articles from live events. Major news organizations like the Financial Times and The New York Times are already deploying AI tools in their newsrooms.

Ethical challenges

The integration of AI is not without considerable challenges.

The generation of fabricated information and non-existent sources are documented failures. These examples highlight critical issues with accuracy and reliability.

Many people have said they do not fully understand the extent to which AI is incorporated into their standard software. This disparity between deployment and user consciousness underscores the subtle yet pervasive nature of AI’s integration. This points to an urgent need for greater transparency and digital literacy.

Bias and intellectual property

Models trained on vast, uncurated internet data often replicate and amplify existing societal biases. For example, studies demonstrate persistent issues such as anti-Muslim bias in LLMs.




Read more:
Artificial intelligence can discriminate on the basis of race and gender, and also age


At the same time, urgent ethical and legal questions regarding intellectual property have emerged. The training of LLMs on copyrighted content without compensation has created significant friction. For example, the pending New York Times litigation against OpenAI highlights unresolved issues of fair use and remuneration for creative work.

Conversely, GenAI demonstrates considerable potential to democratize creative production. These tools, by lowering technical barriers and automating complex processes, can provide access to individuals and groups historically excluded from creative fields due to resource or educational constraints.

Specific applications are already enhancing media accessibility, such as AI-powered tools that automatically generate alt text for images and subtitles for video content.

Navigating this dual-use landscape necessitates the adoption of robust governance frameworks. Fostering industry-wide equity, diversity and innovation education is essential to mitigate risks while harnessing GenAI’s potential for an inclusive creative ecosystem.

Labour and skill evolution

Technological revolutions have historically catalyzed significant transformations in creative labour markets and GenAI represents the latest disruptive force.

The proliferation of GenAI has once again reshaped the creative industries, demanding new professional competencies.

Human creativity and intervention are indispensable, providing cultural and contextual accuracy. Humans must also review AI-generated content for quality and inclusivity.

In response to this shift, higher education institutions need to recalibrate curricula from tool-specific training towards fostering curiosity, ethical reasoning and AI literacy.

The Conversation

The authors do not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and have disclosed no relevant affiliations beyond their academic appointment.

ref. Is AI coming for your creative job? Maybe not – with some human intervention – https://theconversation.com/is-ai-coming-for-your-creative-job-maybe-not-with-some-human-intervention-252796

DIY air cleaners are an easy and cost-effective way to help ventilate homes during wildfires

Source: The Conversation – Canada – By Anne-Marie Nicol, Associate Professor, Health Sciences, Simon Fraser University

In recent decades, the number and severity of wildfires across Canada has increased due to climate change and a more wildfire-prone landscape.

While wildfires can wreak havoc in their immediate area, wildfire smoke can travel thousands of kilometres, putting millions more people at risk from the adverse impacts.

Research on wildfire smoke and health shows that smoke is more than just an irritant. It is increasingly clear that older adults, pregnant people and young children face higher risks to their health, including premature birth, hospitalization and premature death.

One way to reduce smoke exposure is to stay indoors and create a “clean air shelter” by closing the doors, windows and using an air cleaner to remove smoke and other particles from the air.

However, that is easier said than done for many people. While effective, store-bought air cleaners can be expensive and require pricey replacement filters.

In addition, many homes don’t have air conditioners and easily trap heat. Closing all windows means reducing ventilation, and can make hot summer days even more unpleasant. Another option, popularized during the COVID-19 pandemic, is the idea of building your own air cleaner, using easily sourced parts from local hardware stores.

Do-it-yourself air cleaners

An infographic explaining how a DIY air cleaner works
An infographic explaining how a DIY air cleaner works.
(Author provided/The BREATHE Project)

In British Columbia, we started The BREATHE Project to study the impacts of wildfires and distribute information about DIY air cleaners.

A 2023 article by the National Collaborating Centre for Environmental Health compiled evidence on the effectiveness of do-it-yourself (DIY) air cleaners as an alternative to store-bought units.

The results showed that DIY air cleaners are not only more affordable and accessible, but are equally as effective, as long as the correct parts are used and the room size is taken into consideration.

This includes the use of a MERV-13 filter, a minimum 75-watt box fan, duct tape and a shroud cover on the front corners of the fan. One unit can clean a small room, and multiple units can be used for larger spaces.

DIY air cleaners also help reduce other air contaminants including allergens, mold spores, emissions from woodstoves, respiratory pathogens, dust, and traffic related air pollutants.

The U.S. Environmental Protection Agency found similar results in their analysis of DIY air cleaners and determined that the units are safe to use as built.

The BREATHE Project

A short clip about the BREATHE Project and the DIY air cleaner worskshops. (The BREATHE Project)

Our team at Simon Fraser University partnered with the BC Lung Foundation to share this knowledge about cleaner indoor air with communities across British Columbia.

In 2023, we launched a pilot project in the Lower Mainland to find out if workshops about making DIY air cleaners could be feasible. These workshops were held in community centers, libraries, seniors’ centers and neighbourhood houses, with the average participant being over 70 years old and with at least one medical condition.

We were surprised to find that our workshops were fully booked within days of advertising, and that news of our project was quickly spreading by word of mouth within communities.

We used participant feedback to fine-tune our materials and created instructional videos, and a train-the-trainer manual to guide other organizations on how to host similar workshops.

In 2024, we took the project into B.C.’s Interior Health Authority region, where fires were more frequent and more severe.

We named our project BREATHE: Building Resilience to Emerging Airborne Threats and Heat Events and have since added additional resources for communities grappling with the co-exposure of wildfire smoke and extreme heat.

fan blades inside a box with holes for air to pass through held together using duct tape.
A DIY air cleaner being assembled at one of the BREATHE Project’s workshops.
(Author provided/The BREATHE Project)

BREATHE has now partnered with all of B.C.’s health authorities. We have hosted over 90 workshops so far this year, many in northern, rural and remote regions. Workshops have been held in the Cowichan Valley, Lower Mainland, Central Okanagan, the Kootenays and the Northern Rockies.

The project has helped build over 2,500 air cleaners and brought important information about community resilience to people directly impacted by these exposures.

BREATHE also serves as a launchpad for research on the impacts of wildfire smoke on at-risk populations across the province.

Everyone can take steps to protect their health when it is smoky outside. Our resources, including our train-the-Trainer guides and step-by-step videos are free and available on our website. If you are interested in hosting your own workshops, or seeking a collaboration, please reach out through our website.

The Conversation

Anne-Marie Nicol is a Knowledge Mobilization Specialist at the BC Centre for Disease Control.

Prem Gundarah does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. DIY air cleaners are an easy and cost-effective way to help ventilate homes during wildfires – https://theconversation.com/diy-air-cleaners-are-an-easy-and-cost-effective-way-to-help-ventilate-homes-during-wildfires-261336

The creatine boom: Trends and facts about supplements and use

Source: The Conversation – Canada – By Scott Mills, PhD Candidate, Kinesiology and Health Studies, University of Regina

Creatine supplementation is booming among those seeking greater muscle size and performance.

Although creatine is certainly not a new discovery, with research dating back to the 1830s, its popularity and sales have continued to grow, and have expanded beyond bodybuilders and athletes to clinical applications and benefits beyond muscle performance.

Today, creatine stands as one of the most researched supplements, and new findings continue to support its use for consistent and measurable results in bodybuilding, fitness and overall health.

While creatine is naturally found in foods like red meat and seafood, and also produced naturally in the body, supplementation has surged in popularity, especially among young men.

This growth in popularity is largely due to young men’s desire to increase muscle size and muscle strength. Several meta-analyses have looked at the effects of creatine supplementation during resistance training on properties of muscle, and support its use and effectiveness when combined with resistance training.

Simply put, creatine can help maintain energy levels, especially during short-duration, high-intensity exercise like weight training.

Creatine’s role in the body

From a physiological perspective, once in the body, the majority of creatine is stored in the muscle as phosphocreatine (PCr). In this form, it can help maintain energy levels through the maintenance of adenosine triphosphate (ATP), which is the body’s primary energy currency.

Because creatine supplementation increases intramuscular levels of creatine, it may enable resistance training at a higher intensity and for longer durations, leading to greater gains in the gym.

Although creatine’s impact on muscle performance may be more well known, it does not paint the whole picture. Research is revealing creatine’s positive impact outside the muscular system, showing positive effects on the storage and metabolism of glucose, blood-flow dynamics, anti-inflammatory effects and positive benefits for cognition and brain function, to name a few.

Dosage and safety

From a research perspective, dosage recommendations for men can vary, but typically either five grams of creatine daily, or a customized dosage based on bodyweight of (0.1 grams per kilogram per day) have been shown to be well-tolerated and effective for increasing muscle performance.

From a food intake perspective, to consume about five grams of creatine in the diet, an individual would have to consume about 1.15 kilograms of beef, or about a kilogram of pork, for example. This means even a diet that is high in creatine-containing foods may not be enough to maximize its benefits.

The high calorie content of eating enough of these foods to reach the target creatine intake makes supplementation a practical and appealing option, both for ease of consumption and calorie considerations.

Also, from a cost perspective, at about $0.50 per serving, it’s an easy and cost-effective strategy to reach creatine intake goals. With new forms of creatine seemingly being released all the time (capsules, gummies and flavoured powders), it makes it easy to maintain intake.

Regarding the safety of creatine supplementation, a position stand paper by the International Society of Sports Nutrition concluded that creatine supplementation poses no greater adverse effects in healthy individuals compared to placebo, even with higher dosages.

With that being said, creatine hasn’t been immune to its share of negative claims. Anecdotally, creatine may have some whispers of undesirable side-effects; however, research looking at common myths and misconceptions of creatine (including concerns about water retention, hair loss and dehydration) have largely removed many of the fears.

Resistance training is key

It’s important to note that while creatine consumption on its own may still show some positive effects, it is largely creatine consumption in combination with resistance training that leads to benefits.

Resistance training can increase measures of muscle growth and performance (muscle power, muscle strength and muscle endurance) and it’s the combination of creatine with resistance training that will maximize its effects. So resistance training is a paramount component to the positive effects of creatine.

Of course, creatine is not an essential nutrient. Individuals can see improvements in muscle growth and muscle performance while focusing on the intake of high-quality and nutrient-rich foods, a well-designed individualized resistance training program, combined with adequate high-quality sleep and proper stress management without the need to supplement creatine.

A healthy lifestyle is the foundation of well-being, including the groundwork for effectively building muscle.

Creatine supplementation has made its way into the hands of those seeking the secret to greater muscle size and performance. It is well researched and widely accepted, and it continues to increase in popularity due to the positive effects when paired with a solid resistance training program, its safe risk profile when consumed at evidence-based dosages and its low-cost.

While creatine supplementation is not essential, it may be a practical, affordable and effective choice for those seeking muscle growth benefits and beyond.

The Conversation

Scott Mills does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. The creatine boom: Trends and facts about supplements and use – https://theconversation.com/the-creatine-boom-trends-and-facts-about-supplements-and-use-261817

I’m a physicist who studies fossils, and I recently discovered preserved blood vessels in the world’s largest T. rex

Source: The Conversation – Canada – By Jerit Leo Mitchell, Physics PhD Candidate, University of Regina

Advanced technologies reveal new information about ancient fossils. (J. Mitchell), CC BY

Despite the fact that much of the current research in paleontology focuses on trying to find traces of organic remains in fossils, dinosaur DNA has unfortunately never been recovered.

A lot of what we know about dinosaurs comes from preserved bones and teeth that are dug out of the ground. These hard tissues alone, however, are limited in the information they provide.

Soft tissues are extremely rare in the fossil record, but can help provide a much more life-like reconstruction of ancient life. This includes things like muscles and ligaments, pigments or even skin (like scales or feathers), which contain detailed information on how dinosaurs lived and what they looked like.

Another interesting soft tissue that can be found in bones are blood vessels. My research team and I discovered blood vessels preserved in a Tyrannosaurus rex fossil, and our findings were recently published in Scientific Reports.

CBC News Saskatchewan reports on an unexpected discovery in a Tyrannosaurus rex fossil.

As an undergraduate physics student at the University of Regina, I joined a research team using particle accelerators to study fossils. There, I first discovered blood vessels in a bone from a T. rex using advanced 3D models. It’s been nearly six years since that moment; I am now working on my PhD where I use my background in physics to advance analysis techniques in fossil research.

An extraordinary specimen

The vessels were found in a remarkable T. rex specimen nicknamed Scotty. Held in the Royal Saskatchewan Museum’s collection in Canada, Scotty is the largest T. rex ever unearthed. The fossil also remains one of the most complete specimens of T. rex.

Scotty appeared to have had a rough life 66 million years ago; many of the recovered bones appeared to have injuries, possibly due to a fight with another dinosaur, or disease. One bone in particular, a section of rib, features a large partially healed fracture.

In general, after bones experience a traumatic event like a fracture, there is a huge increase in the activity of blood vessels in the affected area as part of the healing process. We believe this is what was found in Scotty’s rib: an extensive network of mineralized vessels that we were able to examine using reconstructed 3D models.

a boomerang shaped fossil bone with the fracture labelled
A fossil from Scotty the T. rex, showing a fractured bone.
(J. Mitchell), CC BY

Revolutionizing paleontology research

When analyzing fossil bones, there are two main challenges. The first is how to examine the interior of the bones without damaging the fossil. And second, the bones are very large and can be quite dense due to the fossilization process, where minerals replace and fill in original organic materials.

At first, we thought we could perform an computed topography (CT) scan of the bone, similar to what is used for medical purposes, which allows imaging of bones without damaging them. While this solves the first problem, the second problem means that a conventional medical CT machine is not nearly powerful enough to penetrate the dense bone.

For our examination, we used synchrotron light, special high-intensity x-rays. These are produced at select particle accelerator labs, and allow us to investigate microstructures such as blood vessels in the bone with ease.

Synchrotron x-rays can also be useful for chemical analysis. We found the vessels were preserved as iron-rich mineralized casts, a common form of fossilization, but in two distinct layers. This layering is due to the complicated environmental history that led to the exceptional preservation seen in Scotty’s rib.

3D printed bone fragments
3D-printed models of the vessel structures found in Scotty’s rib bone.
(J. Mitchell), CC BY

Written in blood vessels

By analyzing blood vessels produced by an incompletely healed fracture, we can hopefully learn how T. rex healed, helping speculation on how Scotty was able to survive after sustaining injuries. This could lead to evolutionary information comparing the vessel structures seen in Scotty to other dinosaur species, as well as modern relatives to dinosaurs like birds.

The results may also help future fossil exploration by guiding scientists to target bones that show signs of injury or disease, potentially increasing the chances of discovering more vessels or other types of preserved soft tissues.

With cross-disciplinary research and novel applications of advanced technologies, there is so much potential to recreate the past lives of dinosaurs like never before.

The Conversation

Jerit Leo Mitchell receives funding from Mitacs Accelerate and the Sylvia Fedoruk Centre for Nuclear Innovation.

ref. I’m a physicist who studies fossils, and I recently discovered preserved blood vessels in the world’s largest T. rex – https://theconversation.com/im-a-physicist-who-studies-fossils-and-i-recently-discovered-preserved-blood-vessels-in-the-worlds-largest-t-rex-261786

Why do we agree to take off our shoes at the airport?

Source: The Conversation – France – By Emmanuel Carré, Professeur, directeur de Excelia Communication School, chercheur associé au laboratoire CIMEOS (U. de Bourgogne) et CERIIM (Excelia), Excelia

It is 7.30am at Terminal 2E at Charles de Gaulle airport near Paris, and in the line leading to the security gates, an executive is removing his belt with a mechanical gesture, a mother is taking baby bottles out of her bag, and a tourist is sighing as he unties his shoes. Everyone is moving forward in beep-punctuated silence, only disturbed by the sound of bins moving along the conveyor belts.

This scene repeats itself relentlessly: according to the International Air Transport Association, 4.89 billion passengers took a flight in 2024, meaning that more than 13 million people a day go through such security checkpoints. (The Trump adminisration recently ended the requirement for people to remove shoes at US airports “during regular security checks”.

At first glance, going through airport security may seem like nothing more than a necessary technical procedure. Viewed from an anthropological perspective, however, this mundane moment reveals a transformation of our identities that is as effective as it is subtle. Something strange happens in these queues: we enter them as citizens, consumers, professionals – and leave them as “passengers in transit”. This metamorphosis, which we take for granted, deserves a closer look.

The dynamics of ritual transformation

What strikes us first in these airport scenes is the gradual, systematic dispossession of personal belongings, clothing, and status symbols deposited into plastic bins before they disappear from view. Then, there is the arbitrary character of the underlying logic: why shoes and not underwear? Why 100 ml and not 110 ml? This apparent lack of coherence actually serves a symbolic purpose: it’s there to create a sense of dispossession that touches on the individual’s social status attributes.

As early as 1909, ethnographer Arnold van Gennep identified separation as the first phase of rites of passage. Individuals must abandon their previous state, shedding what defined them in the secular world. The suited executive becomes an anonymous body, temporarily stripped of his attire, and subjected to the same technological gaze as everyone else. This forced egalitarianism is not a side effect. It is actually central to the process: it prepares for a transformation of identity by neutralizing, albeit temporarily, the usual social hierarchies.

Then comes the screening: scanners, detectors, questions about intentions. “Why are you travelling? Who are you going to see? Did you pack your bags yourself?” Every traveller becomes a temporary suspect who must prove their innocence. This reversal of the burden of proof – of the fundamental principle that one is “innocent until proven guilty” – goes largely unnoticed since it seems entirely “logical” in these circumstances.

This phase corresponds to what Van Gennep called the margin or liminality, a concept later developed by anthropologist Victor Turner: a moment when subjects, deprived of their usual social attributes, find themselves in a state of vulnerability that makes them malleable and ready to be transformed. In this technological in-between, we are no longer fully citizens, nor are we travellers just yet.

Trailer for the film Border Line (2023), by Juan Sebastián Vásquez and Alejandro Rojas, which illustrates the all-security approach to border controls.

Eventually, there is what is called reintegration, to use another term coined by Van Gennep: we are now permitted to enter the area beyond security checks. Officially, we have become “passengers” – a status that requires docility, patience, and the acceptance of various constraints “for the sake of our own safety”. This area, with its duty-free shops and overpriced cafés, highlights this ritual transformation, since we are no longer citizens exercising our right to travel, but global consumers in transit, stripped of our political and territorial roots.

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The paradox of the ‘security theater’

The troubling paradox with security scanners is that although they effectively detect prohibited items (forgotten knives, suspicious liquids) and act as a real deterrent, they fall short when faced with sophisticated threats: in 2015, US test teams succeeded in smuggling fake weapons in 95% of their attempts.

Between 2007 and 2013, the US behaviour detection programme SPOT failed to detect a single terrorist, at a cost of $900 million. It missed the only real terrorists who passed through airports, but there were no hijackings in the United States. The programme therefore appears to be both useless (in the absence of any real threat) and ineffective (in failing to detect real threats).

This lack of operational efficiency is compounded by a major economic imbalance: according to engineer Mark Stewart and political scientist John Mueller, the actual reduction in the risk of terrorism resulting from the tens of millions invested annually by airports is so limited that the costs far outweigh the intended benefits.

Security expert Bruce Schneier refers to this logic as “security theater” – measures primarily designed to reassure the public rather than neutralize the most serious threats. These measures are not dysfunctional, but rather a rational response to social expectations.

After a terrorist attack, the public expects visible measures that, although of questionable effectiveness, will calm collective fears. The “security theater” responds to this demand by producing a sense of protection that helps maintain confidence in the system. Researchers Razaq Raj and Steve Wood of Leeds Beckett University describe how this theater is staged in a way that is reassuring, but sometimes discriminatory, at airports.

This explains why these measures persist and are becoming more common despite their limited results. In addition, they help reinforce a tacit acceptance of authority. This phenomenon relies largely on the status quo bias, which locks us into established systems, and on a societal dynamic of ever-increasing demands for security, with no apparent possibility of turning back.

Learning to be docile

These security checks teach us something more significant than meets the eye. They condition us to accept surveillance as something normal and necessary, benevolent even. This acceptance isn’t limited to airports; it extends to other social contexts. We learn to “show our ID”, to provide justification for our movements, and accept that our bodies be scrutinized “for our own good”.

This system also works by reversing the roles. Resistance becomes suspicious: anyone who questions the procedures, refuses an additional search or gets annoyed by delays is automatically labelled as a “problem”. The binary character of such moral classification – good, docile passengers versus difficult passengers – tends to turn criticism into an indication of potential guilt.

Over time, airport security gestures and their repetition become part of our bodily habits. We anticipate constraints by wearing shoes without laces, carrying prepackaged liquids and making our computers accessible. We develop what philosopher Michel Foucault called “docile bodies”: bodies trained by discipline to internalize constraints and facilitate control.

Beyond airports

The Covid-19 pandemic also introduced similar practices: certificates, passes and behaviours that have become near-rituals. We have become accustomed to “showing ID” for access to public spaces. With each new shock, new collective rules are established, which permanently alter our reference points.

The requirement for passengers to remove their shoes at airports actually dates back to a single failed attempt to carry out a terrorist attack: the December 2001 incident in which a man named Richard Reid concealed explosives in his shoes. One man, one failure… and travellers routinely complying 24 years later where the requirement still exists. This is just one example of an event among others which resonate as “founding myths” used to normalize a number of constraints.

French sociologist Didier Fassin notes the emergence of a “moral government” where obedience becomes a proof of ethics and where questioning control turns into a sign of civic irresponsibility. This evolution is remarkable in that it is largely invisible: we do not see the ritual at work, we just experience “necessary measures”. This normalization probably explains why such transformations encounter little to no resistance.

Anthropology teaches us that the most effective rituals are those that are no longer perceived as such. They become obvious, necessary and indisputable. The system uses what US political scientist Cass Sunstein calls “sludge”. Unlike “nudge”, which subtly encourages good behaviour, sludge operates through friction, making resistance more costly than cooperation. Social psychology research on compliance without pressure suggests that we are more likely to accept constraints when we feel we chose them. By believing that we are making a free choice to board a plane, we freely accept all the constraints that come with it.

Challenging the obvious

The conscious recognition of such mechanisms does not necessarily imply that they should be criticized or opposed. There are legitimate requirements associated with collective security. Being aware of these transformations, however, leads us to question and discuss their rationale, rather than just blindly submitting to them.

Philosopher Hannah Arendt pointed out that understanding power is a step toward regaining one’s capacity for action. Perhaps this is what is at stake here – not rejecting all constraints, but retaining the ability to think them through.

The Conversation

Emmanuel Carré ne travaille pas, ne conseille pas, ne possède pas de parts, ne reçoit pas de fonds d’une organisation qui pourrait tirer profit de cet article, et n’a déclaré aucune autre affiliation que son organisme de recherche.

ref. Why do we agree to take off our shoes at the airport? – https://theconversation.com/why-do-we-agree-to-take-off-our-shoes-at-the-airport-262931

Where you think you are in society (not where you actually are) matters for how you think about inequality

Source: The Conversation – UK – By Giacomo Melli, PhD candidate in sociology, University of Oxford

Where do you see yourself on the ladder? Cristina Conti/Shutterstock

Imagine society as a ladder with ten rungs. Where would you place yourself? That answer reflects your subjective social status – where you see yourself in society. Importantly, this is not necessarily reflective of where you actually are. Subjective social status matters as it shapes what you believe, how you behave, and, as my new study shows, how much you care about economic inequality.

These days, economic inequality is hard to ignore. In the UK, the richest 10% of households holds nearly half of all wealth, while millions struggle to make ends meet.

My research asked: why do some people support reducing inequality while others don’t?

Take two middle class professionals with similar jobs and incomes. One supports higher taxes on the wealthy, the other doesn’t. Why the difference? It’s not just their actua class position. What matters is where they feel they stand in society – their subjective social status.

My research analysed survey data on more than 51,000 people from 25 countries where respondents placed themselves on a ten-rung ladder representing society. This simple question – about how people feel they rank socially – turns out to be a powerful predictor of support for redistribution, such as progressive taxation or government efforts to reduce income inequality.

You might assume that views on redistribution boil down to income: those struggling financially want the government to help reduce inequality, while those who are doing well want to keep things as they are. But what really matters is where people feel they stand compared to others, regardless of their actual income or job.

As the sociological theory known as the Thomas theorem puts it: “If people define situations as real, they are real in their consequences.” These consequences can also affect politics – how people perceive their social standing can shape what policies (and parties) they support.

Where do you think you are?

My research found that people who feel at the bottom of the social ladder tend to support income redistribution, regardless of how unequal their country actually is. That might seem obvious.

But what’s striking – and what the research also shows – is how often people’s perceptions don’t match their economic reality. One in five who place themselves in the top third are in fact working class, while one in five people who see themselves in the bottom third of society are actually high income earners in their country. People’s perceptions of where they stand often don’t match reality because they rely on personal background, upbringing and comparisons with peers or social circles.

You might expect those who feel near the top of society to oppose redistribution, especially in countries where inequality is high. Yet the evidence tells a different story. People behave very differently depending on how unequal their society is.

In countries where income inequality is high, those who feel privileged are often more supportive of redistribution. This doesn’t happen in countries where inequality is low. My findings show that, for example, someone who feels near the top in the US (an unequal country) is 31% more likely to support government action to reduce inequality than their counterpart in more equal Denmark.

This suggests that “wealthy” people’s attitudes aren’t just about protecting their own interests. Something else is at play.

Fear and altruism

One possible answer lies in two feelings: fear and altruism. Those who feel socially well off don’t live in a vacuum, they notice when inequality is high around them. Whether out of fear for their own safety, altruism for those struggling or both, these feelings can lead even the privileged to support government efforts to reduce inequality.

Why should those who feel at the top of society in low-inequality countries worry? They think they are doing well, and they can see that society around them is also functioning reasonably well.

People respond not only to their material conditions, but to how they see themselves and the context around them. Even those who feel they’re doing well may support redistribution if they believe growing inequality could threaten the system.

Wooden blocks depicting two people on an uneven seesaw, against a yellow background
Where you think you are in terms of wealth in society doesn’t necessarily reflect where you actually are.
Bored Photography/Shutterstock

This research reveals something crucial about how politics works in democratic societies. Politics is about how people see themselves, not just their income or class. This matters beyond redistribution. It also affects populist attitudes, electoral participation and support for far-right parties.

This insight helps explain why some middle-class voters might back policies that don’t seem to benefit them, and why opinions vary so much between similar countries. As inequality keeps shaping political debates worldwide, understanding these feelings becomes key to making sense of contemporary politics. At the end of the day, it’s perception, not just reality, that drives the politics we see.

The Conversation

Giacomo Melli does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. Where you think you are in society (not where you actually are) matters for how you think about inequality – https://theconversation.com/where-you-think-you-are-in-society-not-where-you-actually-are-matters-for-how-you-think-about-inequality-259715

From clear skin to detoxing, chlorophyll and collagen supplements promise a lot, but what does the science say?

Source: The Conversation – UK – By Dan Baumgardt, Senior Lecturer, School of Physiology, Pharmacology and Neuroscience, University of Bristol

Tatevosian Yana/Shutterstock

Walk into any health store, scroll through TikTok, or browse the shelves of your favourite beauty retailer, and you’ll be met with a familiar promise: that a pill, powder or potion could be the secret to glowing skin, boosted energy, or even inner “detoxification.” Among the most hyped are chlorophyll – the green pigment in plants now found in trendy waters and tinctures – and collagen, the protein hailed as the holy grail for youthful skin and strong joints.

But how much of the buzz is backed by science? And how much is just clever marketing dressed up in green juice and glossy packaging?

Let’s take a closer look to explore what they actually do, what the evidence says, and whether your money (and hopes) might be better spent elsewhere.

Chlorophyll

Dark leafy greens like kale and cavolo nero are well known for boosting levels of essential nutrients such as iron, folate and beta-carotene. They’re also rich in chlorophyll – the pigment that plays a key role in photosynthesis, the process by which plants use sunlight to produce glucose and oxygen.

Some wellness influencers, including Gwyneth Paltrow and Kourtney Kardashian-Barker, have popularised chlorophyll water as part of their daily health routines. Both promote it through their respective wellness brands – Goop and Poosh – touting a range of supposed benefits, from reducing body odour to supporting detoxification. One of the more persistent claims is that chlorophyll – in water or supplement form – can “oxygenate” the blood.

But as Ben Goldacre – physician, academic and prominent critic of pseudoscience – has pointed out, that claim doesn’t quite hold up. The human body, unlike a plant leaf, isn’t flooded with sunlight. And without light, chlorophyll simply can’t perform photosynthesis in the gut or bloodstream. It can’t generate oxygen internally – no matter how green your smoothie.

So what does chlorophyll actually do? Aside from turning plants (and your poo) a vivid shade of green, its core function is to trap sunlight and convert water and carbon dioxide into glucose and oxygen. Cast your mind back to GCSE biology and the familiar photosynthesis equation scribbled across the whiteboard.

Through this process, plants generate food for themselves and for animals – while releasing oxygen into the atmosphere. It’s a pathway fundamental to life on Earth. But since we breathe in oxygen and eat carbohydrates, we’ve managed to thrive without chlorophyll. And for it to work in humans the way it does in plants, it would surely need to be present in our skin – effectively turning us into the Wicked Witch of the West.

So what about those wider health claims? Supplement packaging for chlorophyllin – a semi-synthetic, water-soluble form of chlorophyll thought to be more active – often promises detoxification, glowing skin, improved wound healing and even better body odour.

The suggested mechanisms? Chlorophyll may inhibit bacterial growth or neutralise foul-smelling compounds in the gut. It’s also been proposed as a free radical scavenger – mopping up the unstable molecules generated by toxins or metabolism that can damage tissues.

The evidence is mixed. A few (much older) studies suggest chlorophyllin can reduce the odour of faeces and flatulence, although it might also turn them green. There’s weaker evidence when it comes to halitosis or body odour. Research supporting its role as an antioxidant is limited, and the buzz around weight loss is largely anecdotal. Realistically, any benefit in that department likely comes from a diet rich in greens – low in fat and high in fibre – rather than chlorophyll alone.

Where things get more promising is in wound care. Chlorophyll-based dressings have been investigated for their ability to accelerate healing and reduce odours from infected wounds.




Read more:
How to treat a wound – without using superglue, grout or vodka, like some people


Collagen

But chlorophyll isn’t the only so-called “miracle” substance being sold to the wellness crowd. Take collagen – arguably even more popular than any green powder or superfood pill.

Collagen is a protein and a natural component of connective tissue found throughout the body. It gives strength and structure to the skin, bones, ligaments, blood vessels – even the heart and lungs. Without enough collagen – or in conditions where collagen production is impaired, such as Ehlers-Danlos syndrome – tissues can become fragile, prone to damage or slow to heal.

All the more reason, then, to make sure our bodies can produce it. Collagen is made from amino acids – the building blocks of protein – so eating enough protein is essential. Vitamin C also plays a vital role, helping the body synthesise collagen from those amino acids.

But do we really need to supplement it? What does the evidence say? Some studies suggest oral collagen supplements may help improve skin appearance, support joint health, increase bone strength, and enhance muscle mass. But there’s no convincing evidence that they promote weight loss or treat cardiovascular or autoimmune conditions – despite the lofty promises made by some brands.

Topical collagen products are even more widespread, but their scientific backing is thinner. Collagen molecules are generally too large to be absorbed through the skin, meaning they’re unlikely to have any meaningful impact on wrinkles. At best, they may hydrate the surface and offer a temporary plumping effect.

In short, the research is patchy – encouraging in some areas, inconclusive in others. And when it comes to supporting your body’s natural collagen production, there may be more effective (and less expensive) options. Foods such as chicken, fish, eggs and bone broth ensure a good protein intake. So too are collagen-supporting micronutrients, including vitamin C, copper and zinc.




Read more:
Bone broth is hyped by celebrities and hailed as a wellness superfood – here’s what the science says


So unless you’re Poison Ivy from Batman (who, to be fair, looks fantastic), you probably don’t need to load up on chlorophyll. And unless your diet is lacking, you don’t need to shell out for collagen powders or creams either.

Love the skin you’re in. It’s better than turning green like Elphaba from Wicked.

The Conversation

Dan Baumgardt does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. From clear skin to detoxing, chlorophyll and collagen supplements promise a lot, but what does the science say? – https://theconversation.com/from-clear-skin-to-detoxing-chlorophyll-and-collagen-supplements-promise-a-lot-but-what-does-the-science-say-261210

Synthetic drugs are having devastating effects around the world, from Sierra Leone to the UK

Source: The Conversation – UK – By Joseph Janes, Senior Lecturer in Criminology, Swansea University

In the blistering heat of Freetown, Sierra Leone, young men gather on street corners, their limbs swollen, eyes glazed. They are the victims of kush, a cheap and deadly synthetic drug sweeping the country.

But kush is not an isolated tragedy. From the townships of apartheid South Africa to the 21st-century streets of the UK, synthetic drugs have a long history of flourishing in places where society has abandoned its most vulnerable.

Kush first appeared in Sierra Leone around 2016, but its spread in recent years has been nothing short of catastrophic. Between 2020 and 2023, psychiatric admissions linked to the drug skyrocketed to a reported 1,865 cases at the country’s only psychiatric hospital.

The drug claims mostly young men between the ages of 18 and 25, whose bodies are ravaged by kush’s toxic effects. Doctors in Freetown estimate that hundreds of users have died from organ failure caused by the drug in recent months.

Sierra Leone’s president, Julius Maada Bio, branded kush a “death trap” and declared a national emergency. The drug, he says, represents an “existential crisis” for the nation.

Kush is both cheap and easily accessible, sold openly on the streets for as little as 20 pence per joint. But for those hooked on it, the cost can climb to £8 a day. This is a staggering sum in a country where the average income barely exceeds £4,000 a year.

The drug’s ingredients are equally chilling. A mix of cannabis, synthetic opioids like fentanyl, formalin (used in embalming) and, according to some reports, ground human bone, it’s a concoction that speaks to the bleakness of life for those who turn to it.

Channel 4 News report on kush in Sierra Leone.

Kush’s grip on Sierra Leone is not a random phenomenon but a symptom of a much deeper problem. The drug has become a chemical escape for people who see no viable future for themselves.

For those living in poverty and experiencing hunger, kush offers something that life in Sierra Leone often cannot: temporary relief from trauma and despair. It’s not a recreational indulgence but survival in a country where many face daily battles just to get by.

The drug’s rise follows a pattern seen in other parts of the world, where synthetic substances fill the void left by broken systems.

Apartheid South Africa

The situation in Sierra Leone echoes a chilling chapter from South Africa’s apartheid era. In the 1980s, methaqualone, a synthetic sedative-hypnotic drug – sold as quaalude or mandrax – became widely used in the townships, particularly among Black communities.

Often smoked alongside cannabis in a mix known as the “white pipe”, it became a cheap, sedative drug much like kush in Freetown today.

Vice documentary on methaqualone.

The apartheid government didn’t just turn a blind eye to its widespread use but deliberately encouraged it. Under the secretive Project Coast, the government’s chemical and biological warfare programme, scientists developed large quantities of methaqualone, ostensibly for crowd control and incapacitation.

Methaqualone was not officially declared a weapon. But evidence compiled by the UN suggests it was developed and stockpiled in prototype delivery systems that were intended to incapacitate without killing, then deployed quietly among the dissenting population.




Read more:
Addicted: how the world got hooked on illicit drugs – and why we need to view this as a global threat like climate change


The parallels with kush are undeniable. Both are chemically produced, highly addictive depressants offering cheap and easily accessible sedation to marginalised populations. These types of drug do not just affect individuals but serve to suppress entire communities under the weight of structural violence.

In South Africa, methaqualone was weaponised by the state as a means of control, while in Sierra Leone, kush has emerged in areas abandoned by the government. In both cases, the effect is the same: a drug-fuelled stasis that deepens despair and maintains a status quo of social neglect.

It’s a pattern where a synthetic depressant materialises in places where no other social or economic medicine exists, sedating not only bodies but resistance and possibility.

Spice in the UK

This pattern of synthetic drugs as a response to social decay is not confined to Africa. In the UK, synthetic drugs such as spice have become more common over the past decade, especially among homeless people and prisoners. Described as a “zombie drug” for its paralysing effects, spice is often used not for pleasure but to escape hunger, cold and trauma.

A 2023 study among the UK’s homeless population found that nearly 70% of participants, aged 18-64, used synthetic drugs such as spice to escape the harsh realities of homelessness. Many reported adverse effects that led to hospitalisation.

In many British towns and cities, it has become common to see users slumped on pavements or convulsing in parks, echoing the scenes from Sierra Leone’s kush hotspots.

This serves as a stark reminder that synthetic drugs are not an isolated issue. They are a global crisis playing out in different forms but with the same underlying causes.

Synthetic drugs like kush, methaqualone and spice are symptoms of deeper systemic failures. They thrive where housing is unstable, unemployment is rampant and healthcare is out of reach. Addressing the crisis requires more than just cracking down on drug use. It demands a radical shift in how we treat the most vulnerable in our society.




Read more:
‘There has never been a more dangerous time to take drugs’: the rising global threat of nitazenes and synthetic opioids


In Sierra Leone, this means investing in youth employment, improving nutrition and strengthening mental health services. In the UK, it calls for restoring funding to housing and substance use services, and recognising that stable shelter and social support are fundamental to recovery, not rewards for abstinence.

If we are serious about tackling this problem, we need to move beyond punishment and focus on addressing the root causes of addiction. Only by investing in social care and harm reduction can we hope to break the cycle of sedation and despair.

The Conversation

Joseph Janes does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. Synthetic drugs are having devastating effects around the world, from Sierra Leone to the UK – https://theconversation.com/synthetic-drugs-are-having-devastating-effects-around-the-world-from-sierra-leone-to-the-uk-262746

Will Trump’s deal between Armenia and Azerbaijan lead to lasting peace?

Source: The Conversation – UK – By Brian Brivati, Visiting Professor of Contemporary History and Human Rights, Kingston University

Armenia and Azerbaijan signed a peace framework in Washington on August 8 after nearly four decades of conflict. The two nations, long divided over territorial disputes, committed to end hostilities, normalise relations and respect each other’s territorial integrity.

Brokered by the US president, Donald Trump, it had all the glitzy appearance of a comprehensive peace agreement. But in reality, it is merely a move in that direction. There are still many ways it could break down.

The decision of Armenia’s prime minister, Nikol Pashinyan, to pursue peace is politically risky. Armenian military defeats to Azerbaijan in 2020 and 2023, and the loss of the disputed Nagorno-Karabakh region, left deep scars.

Many Armenians feared concessions would legitimise Azerbaijan’s military gains or erode national sovereignty. Diaspora voices warned of “rewarding aggression” and ignoring the rights of displaced Karabakh Armenians. Yet Pashinyan pressed ahead, arguing a diplomatic settlement was the only route to security and prosperity.

His pivot away from relying on Russia – a former security guarantor whose credibility in Armenia has crumbled after failing to stop Azerbaijan from seizing Nagorno-Karabakh – signals a profound geopolitical shift. The US is now the guarantor of security, ending the Minsk process that has been working to resolve the conflict since 1994.

Sovereignty secured

One of the thorniest issues was Azerbaijan’s demand for a land route across southern Armenia to connect with its Nakhchivan exclave. Armenians feared this could mean ceding control of national territory. The US-brokered agreement resolves the dispute.

Armenia retains full sovereignty and jurisdiction over any new route. All transport links will operate under Armenian law, with Armenian customs and security in place. This is a marked improvement on the vague “unimpeded” transit clause in the 2020 ceasefire, which left room for dispute.

By enshrining sovereignty in the text, Armenia can reassure its public that the corridor is not an extraterritorial carve-out, but a transport link it is hosting. However, the corridor runs close to the Iranian border. And the Iranians, also pushed out of their influential role in Armenia by this deal, have already rejected it.

Following its recent war with Israel, Iran is perhaps too weak to stop the project from starting. But it could represent a threat to the security of companies involved in the route’s construction.

A map of the South Caucasus.
The peace deal creates a US-overseen transit area that will allow ‘unimpeded connectivity’ between Azerbaijan and its Nakhchivan exclave.
Peter Hermes Furian / Shutterstock

The transit corridor, which connects Azerbaijan to Turkey as well as to Nakhchivan, will be named the Trump Route for International Peace and Prosperity. The US has secured a 99-year development lease for the route. Planned infrastructure includes highways, railways, pipelines and fibre-optic cables.

Armenia keeps legal control, but gains investment and transit revenue from these endeavours without bearing construction costs. Azerbaijan will gain faster, cheaper export routes for oil, gas and manufactured goods to Turkish and European markets. Armenia also stands to benefit from access to Turkey if the border reopens – the Turks closed it in 1993 in support of Azerbaijan.

Armenia and Azerbaijan have signed separate bilateral agreements with the US on energy, technology and infrastructure, signalling a parallel push to modernise their economies as they normalise relations. Georgia, traditionally the most pro-western and strategically vital state in the South Caucuses, has been sidelined by this arrangement. This is a consequence of its more pro-Russia stance.




Read more:
Georgia: how democracy is being eroded fast as government shifts towards Russia


The Washington summit has capped years of intermittent mediation attempts. What set this round apart was sustained, high-level US engagement. The Trump administration sent envoys repeatedly, kept negotiations focused on solvable issues, and re-framed the transit corridor as a shared commercial venture.

US involvement is also a built-in guarantee. By taking a long-term stake in the corridor’s development, Washington has an interest in ensuring the agreement is implemented and respected. For Armenia, US backing offers reassurance against renewed coercion from Azerbaijan backed by Turkey. And it opens the door for Azerbaijan to forge deeper ties with the west during a period of bad relations with Russia.

Hurdles ahead

Despite the celebratory signing, the peace deal faces significant hurdles. The agreement sidesteps the plight of Armenian prisoners of war and detainees still held in Azerbaijan. It also ignores the right of return for over 110,000 Armenian civilians who were forcefully expelled from Nagorno-Karabakh. Armenian opposition and diaspora groups have criticised the accord for “sidelining justice”.

Political challenges inside Armenia further cloud the deal’s future. Azerbaijan’s president, Ilham Aliyev, has demanded that Armenia amend its constitution to renounce any territorial claims – specifically removing the 1990 declaration of independence that implied Nagorno-Karabakh is part of Armenia. Baku insists this change is a prerequisite for a “final” peace treaty.

Such external pressure is deeply sensitive. Pashinyan has agreed in principle that Armenia needs a new constitution by 2027 to reflect post-war realities. But if the alterations are perceived as capitulation to Azerbaijani diktat, the domestic backlash could be intense.

The Armenian opposition – already angered by the loss of Karabakh – will likely seize on any constitutional concessions as evidence of national humiliation. With parliamentary elections on the horizon in 2026, Pashinyan’s rivals are positioning to campaign against the peace deal.

They argue that his western-leaning “peace agenda” endangers Armenia’s sovereignty and security. Some have hinted they would reject or renegotiate the agreement if they come to power. Pashinyan’s party was polling poorly earlier in 2025, and recent local elections saw gains for pro-Russian figures, suggesting a volatile electorate.

Armenia’s security services have warned of possible foreign interference and destabilisation efforts as the elections approach. Moscow, in particular, could covertly back Pashinyan’s hardline opponents or spread disinformation to sway the vote, hoping to install a more Russia-aligned leadership that might undermine the deal.

The Washington framework has opened a path to peace. But the coming months and years will determine whether pragmatic interests can triumph over entrenched mistrust.

To succeed, Armenia and Azerbaijan must navigate a minefield of unresolved disputes and political minefields at home, all under the gaze of regional powers uneasy about their changing environment. Washington and Brussels will need to remain engaged, to guarantee compliance and help deliver early economic gains that reinforce peace.

If either side reneges – be it through renewed demands, slow-rolling implementation or back-channel interference – hard-won progress could quickly unravel. This historic breakthrough thus marks not an endpoint but the start of a delicate balancing act.

The Conversation

Brian Brivati does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. Will Trump’s deal between Armenia and Azerbaijan lead to lasting peace? – https://theconversation.com/will-trumps-deal-between-armenia-and-azerbaijan-lead-to-lasting-peace-262889

Gene therapy can be less effective in women – and my research in mice brings us one step closer to understanding why

Source: The Conversation – UK – By Alison Clare, Senior Research Associate, Translational Health Sciences and Ophthalmology, University of Bristol

Some gene therapies may be less effective in women. crystal light/ Shutterstock

Gene therapies hold immense promise for treating sight loss. These therapies use a modified, harmless virus to deliver therapeutic genes directly to diseased cells, helping them to function normally again.

But numerous clinical trials have found that gene therapy causes serious side-effects in some patients because their immune system recognises the virus and attacks it.

So to improve safety and efficacy of gene therapy in the eye, my colleagues and I wanted to understand more about this immune response so we can someday prevent it from happening.

We discovered that old female mice were more vulnerable to experiencing a damaging side-effect from gene therapy, compared to both male mice and young female mice. This reaction was directly related to differences in the way the immune systems of old female mice functioned.

To conduct our study, we gave both male and female mice the gene therapy, which was delivered into the eye. The therapy was tested on young, middle-aged and old mice.

We found that in young mice, females had increased immune activation – even from a lower dose of gene therapy. A similar finding was also recently observed in human blood samples – with women’s immune cells exhibiting greater amounts of inflammation, a sign these immune cells were mounting an attack against the therapy.

Our research went on to show that age was also associated with a stronger inflammatory response to the gene therapy. This was true for both old male and female mice. The inflammatory response lasted longer in the older mice, too.

When we looked more closely at a specific type of immune cell that’s found in the brain and eye, we saw that in older female mice these cells showed signs of both an earlier stress response and stronger inflammatory reaction compared to younger mice and male mice. This reaction was also linked to signs of tissue degeneration.

Together, these findings suggest that women, particularly older women, could be at greater risk of harmful reactions to gene therapy – especially at the doses needed for these therapies to work.

Although our study was conducted in mice, it’s not the first research to show that immune response differences can affect the way men and women react to certain treatments.

Another research group also showed that female mice mounted a stronger response against a gene therapy – recognising it as foreign and removing it. This reduced the amount of therapy delivered successfully to females compared to males.

Treatments for conditions such as arthritis are another example of the way women’s immune response can affect how they respond to treatment. These immunotherapies work better in men compared to women. Some scientists believe this is because women’s immune systems are more likely to recognise the drug as foreign and remove it.

Sex differences and immune function

There’s one key reason men’s and women’s immune systems may respond differently to the same treatment. Women’s immune systems are generally more reactive than men’s to anything unfamiliar.

A digital drawing depicting a strand of DNA, alongside the X chromosome.
The X chromosome plays a role in immune response.
Anusorn Nakdee/ Shutterstock

The types of immune cells that respond the strongest and fastest to a foreign substance are different for men and women. This is because sex hormones – primarily oestrogen for females and testosterone for males – directly affect the way these cells behave.

The X chromosome also plays a role in immune response, as it contains a greater number of immune-related genes compared to the Y chromosome. Females have two X chromosomes, while males have one X and one Y chromosome. These differences will affect how well men and women respond to treatments.




Read more:
How biological differences between men and women alter immune responses – and affect women’s health


Age further affects how the immune system acts – and how the body responds to different treatments.

As we get older, our immune cells lose their ability to recognise and remove foreign pathogens – though these cells still continue to stimulate inflammation. This leads to a persistent inflammatory state, which is thought to be involved in many age-related conditions – including cardiovascular disease and neurodegeneration.

Differences in immune cell function also become more evident for men and women after the age of 65.

In older men, their inflammatory immune cells are more active after the age of 65, while their adaptive immune cells (which coordinate the recognition and removal of foreign pathogens) are less active.

But as women age, their adaptive immune cell activity can stay the same. Having a stronger adaptive immune response increases the risk of autoimmune conditions – a condition that has been linked to certain neurodegenerative diseases.

These differences help explain why vaccines are less effective for older men because they have fewer functioning adaptive immune cells. They may also help to explain why the older female mice in our study had adverse reactions to the gene therapy, as their immune cells are more primed to attack.

Women have historically been underrepresented in biomedical research. Modelling everything on males has created a data gap in clinical translation, causing harm. For instance, women have nearly twice as many adverse reactions to a drug compared to men.

But studies like ours are helping to provide important insight into why certain medications are less effective in women – and how the immune system is implicated. Crucially, these findings can also help us identify new targets to explore for future treatments.

The Conversation

Alison Clare has received funding from the Wellcome Trust and the Medical Research Council. Her position is currently funded by National Institute for Health and Care Research (NIHR) Biomedical Research Center based at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology.

ref. Gene therapy can be less effective in women – and my research in mice brings us one step closer to understanding why – https://theconversation.com/gene-therapy-can-be-less-effective-in-women-and-my-research-in-mice-brings-us-one-step-closer-to-understanding-why-258135