New study: How Smoking is Making You Lonelier Over Time

Smoking was long coded into popular culture as a social ritual – a prop for bonding, a reason to step outside with someone, a shared moment between strangers. A study of more than 51,000 people, presented in September 2026, found the opposite is true. Current smokers are measurably lonelier than non-smokers, and that gap widens over time.

The research was drawn from the Survey of Health, Ageing and Retirement in Europe (SHARE), one of the continent’s most comprehensive longitudinal datasets. The study involved more than 51,000 older adults across 15 European countries, and found that current smokers were significantly lonelier than non-smokers. Prior research had established that lonely people are more likely to take up smoking, treating it as a social bridge. This study inverted the question entirely and found the habit itself appears to drive people further into isolation.

The study was presented by Dr. Keir Philip, Clinical Lecturer in Respiratory Medicine at the National Heart and Lung Institute, Imperial College London, to the European Respiratory Society Congress. The 2026 findings, drawn from 15 countries, represent a substantial expansion of Dr. Philip’s earlier work, which had tracked 8,780 older adults in England for 12 years and reached consistent conclusions.

The Study: Design, Scope, and Findings

The study included 51,532 participants from 15 European countries, with a mean age of 67 years and 22% being current smokers at the start. Researchers quantified loneliness using the UCLA Loneliness Scale, a validated instrument that asks participants how often they feel they lack companionship, feel left out, and feel isolated from others. It translates subjective social experience into a measurable score, making it possible to track changes over time, not just capture a single snapshot.

Among the more than 50,000 adults aged approximately 67 years across 15 European countries, current smoking was associated with higher loneliness scores and greater increases in loneliness over two years compared with not currently smoking. That longitudinal dimension is what separates this study from many in the field. Cross-sectional data – a one-time measurement – can show that smokers and lonely people overlap, but it cannot establish which came first. A two-year follow-up, measuring the same people at two points, provides much stronger evidence that smoking is contributing to the deterioration of social connection rather than simply co-occurring with it.

Critically, the findings show that current smokers reported higher levels of loneliness than non-smokers regardless of age or gender. Age and sex are among the strongest confounders in social research – the fact that the smoking-loneliness relationship held across both variables makes the findings more robust and harder to explain away as a demographic artifact. Dr. Philip’s earlier 12-year study of 8,780 older adults in England, published in The Lancet Regional Health Europe in 2022, reached the same conclusion, giving the Barcelona findings a solid foundation of prior evidence.

Why Smoking Drives Isolation: Three Proposed Mechanisms

Dr. Philip believes one likely mechanism for smoking and loneliness becoming linked is that progressive smoking-related illnesses limit mobility, making it more difficult for people to access and participate in social activities. Chronic obstructive pulmonary disease (COPD), peripheral vascular disease, and other smoking-related conditions progressively restrict physical capacity. A person who can no longer walk far, climb stairs, or sustain conversation without breathlessness is effectively excluded from many forms of social life – the dinner party, the community event, the walk with a friend.

A second potential mechanism relates to social norms around smoking near other people. Smoking bans in public places and informal smoke-free environments in people’s homes may make such places less appealing to people who smoke, which could limit the potential for social interactions. The cultural geography of smoking has shifted dramatically over the past three decades. Where once it was permitted at the dinner table, in the office, and at the bar, smokers are now largely restricted to outdoor areas, often at a distance from the main social space. Each regulation that moves smokers further from where social life happens also moves them further from the people around them.

A third mechanism is explored in a 2025 study published in Substance Use and Misuse by researchers at the University of Oklahoma and Duke University. Acute nicotine exposure can increase the brain’s response to reward, but chronic exposure may reduce that response through withdrawal. This could theoretically impact a smoker’s drive to pursue and engage with non-smoking rewards, including social interaction — meaning long-term nicotine dependence may reduce the motivation to seek out social contact.

A fourth dynamic, explored in prior Lancet research by Dr. Philip’s team, involves social stigma. The de-normalisation of smoking, stigma from others and from oneself, and smoke-free legislation are intricately linked components of broader societal changes related to smoking. A smoker who feels judged may withdraw from social settings preemptively – avoiding situations where they know smoking is unwelcome or where they expect disapproval.

The Broader Context: Smoking and Loneliness as Compounding Threats

The relationship between smoking and loneliness carries particular weight because both are, independently, serious threats to longevity. The WHO Commission on Social Connection, established in 2023, found that loneliness and social isolation have serious health impacts placing social health in a tier comparable to other major public health risks such as air pollution, tobacco and alcohol.

The WHO Commission was established to address loneliness as a pressing health threat, promote social connection as a priority, and accelerate the scaling up of solutions across countries of all incomes. U.S. Surgeon General Dr. Vivek Murthy compared the health risks of social disconnection to smoking 15 cigarettes a day. The symmetry is now almost poetic: smoking is as dangerous as loneliness, and, as the new data shows, smoking actively produces loneliness.

According to the CDC, about 1 in 3 adults in the U.S. report feeling lonely. Among older adults, the consequences are measurably severe. Social isolation and loneliness can increase a person’s risk for heart disease and stroke, type 2 diabetes, depression, anxiety, and premature death. The WHO Commission’s flagship report, published in June 2025, also found that one in six people globally are affected by social disconnection and loneliness.

The WHO reports that up to one in three older people feel lonely, and a large body of research shows that social isolation and loneliness have a serious impact on older people’s physical and mental health, quality of life, and longevity. For older adults specifically, loneliness is linked to a dramatically elevated risk of cardiovascular disease. A 2026 peer-reviewed study found that loneliness was an independent risk factor for cardiovascular disease, with a 42.9% higher risk among healthy older adults who reported feeling lonely. Research published in a 2023 journal analysis found that social isolation is associated with increased risk for all-cause mortality, with a hazard ratio of 1.33 compared with people who are socially connected.

The cognitive risks are equally serious. Loneliness is associated with a broad range of mental and physical health outcomes, including higher rates of substance use. Research has also found that loneliness roughly doubles the risk of depression and anxiety, and is increasingly associated with cognitive decline and dementia risk. The feedback loop this creates for smokers is significant: smoking raises loneliness, loneliness raises depression risk, and depression is itself one of the strongest predictors of continued smoking and failed quit attempts, according to Behavioral Health News.

A Vicious Cycle – and a Bidirectional Relationship

The research does not argue that smoking is the only cause of loneliness, or even the primary one. Previous research has found that people who are isolated and lonely are more likely to smoke, and this latest study found that smoking itself may also lead to higher levels of isolation and loneliness. The relationship appears to be bidirectional, creating a feedback loop that entrenches both behaviors.

Dr. Philip noted: “Our findings contribute to existing knowledge in this area, and suggest the existence of a vicious cycle of smoking, social isolation, and loneliness.” A 2026 longitudinal study from the Behavioural Science Institute at Radboud University in the Netherlands, published in the International Journal of Mental Health and Addiction, examined this dynamic specifically in adolescents and young adults, finding that loneliness and smoking are mutually reinforcing across age groups – not just in older populations.

The mechanisms appear to differ somewhat by age. Among older adults, physical disease burden is likely the dominant driver: smoking-related illness restricts mobility, which restricts social participation. Among younger adults, social stigma and norms play a larger role – a 2024 study published in BMJ Open found significant associations between loneliness and positive attitudes toward cigarette smoking among university students, suggesting that lonely younger people may be drawn toward smoking as a perceived pathway to social belonging, only to find it deepens their isolation.

Policy Implications: Rethinking How We Frame Quit Messaging

Professor Des Cox, a member of the European Respiratory Society’s Advocacy Council and clinical professor at University College Dublin, who was not involved in the research, said: “This is important information for people who smoke. It is vital to support people to quit smoking without stigmatizing them.”

The policy implications extend beyond individual quit campaigns. Researchers at Texas A&M University’s School of Public Health published work in January 2026 asking whether the public health strategies that dramatically reduced smoking rates in the United States over the past half-century – public awareness campaigns, tax policy, social norm shifts, access to cessation support – could serve as a model for addressing the loneliness epidemic. That Texas A&M team aligned tobacco reduction strategies with the U.S. Surgeon General’s advisory on the current epidemic of loneliness and social isolation.

Dr. Philip concluded: “Smoking is not social; our research shows it leads to increased social isolation and loneliness. Spreading the word through various routes will be key, from pubs to public policy – the psychosocial impacts of smoking need to be made clear.” That shift in framing – from smoking as a health risk to lungs, to smoking as a risk to your social life – could prove more effective with certain audiences, particularly younger people for whom immediate social consequences resonate more viscerally than distant mortality statistics.

What to Do With This Information

For anyone who smokes, the data adds a dimension that physical health warnings alone have never captured. Smoking appears to be quietly narrowing your social world – measurably, progressively, and across every age group and gender studied. The cigarette break outside the bar is not the social moment it looks like. Over years, research now suggests, it may be pushing the next genuine conversation further away.

For clinicians and public health practitioners, the evidence points to a specific gap in current cessation strategy. Quit programs that treat smoking as a purely physical addiction – addressable through nicotine patches, medication, and willpower – are missing the social scaffolding that keeps many people smoking. Addressing the stigma, the isolation, and the loneliness that both precede and follow the habit could make the difference. Dr. Philip’s own research put it plainly: “Our research suggests smoking is bad for aspects of psychological and social health in addition to the well-established physical impacts of smoking.” Framing cessation as a route to a richer social life, rather than simply a longer one, may be the most underused tool in public health messaging.

The practical implication is concrete: if you’re trying to quit, building or strengthening social connections at the same time may improve your odds. Support groups, structured social activities, and community-based cessation programs all work on both fronts simultaneously. The WHO Commission on Social Connection, the U.S. Surgeon General’s loneliness advisory, and a 51,000-person study across 15 countries are all pointing in the same direction – smoking and loneliness are not parallel crises. They are deeply entangled ones, and addressing either may be one of the most effective ways to address the other.

Disclaimer: This information is not intended to be a substitute for professional medical advice, diagnosis, or treatment and is for information only. Always seek the advice of your physician or another qualified health provider with any questions about your medical condition and/or current medication. Do not disregard professional medical advice or delay seeking advice or treatment because of something you have read here.

AI Disclaimer: This article was created with the assistance of AI tools and reviewed by a human editor.