Loneliness strongly linked to poorer mental health and wellbeing, study finds
University of Bristol
People who feel lonely are much more likely to experience poorer mental health and lower wellbeing, a new collaborative study led by the University of Bristol, Nesta and Amsterdam UMC has found. Loneliness was also found to be linked with worse general health, including experiencing multiple health conditions. Social isolation is associated with lower wellbeing, too.
Loneliness is increasingly recognised as a major public health issue, with growing evidence connecting it to poorer health. However, it is unclear whether loneliness itself contributes to poor health or whether these links are driven by other factors.
The study, in association with the universities of Oxford and Manchester, combined evidence from three different research methods, including observational analysis, sibling comparisons, and Mendelian randomisation, a genetics-based approach, to build a clearer understanding of these relationships.
Using data from the UK Biobank and large-scale genome-wide association studies, the researchers investigated how both loneliness - the quality of a person's social relationships; and social isolation - the number of social connections, relate to health and wellbeing. The study is published in Nature Communications today [15 July].
The research team found that loneliness and social isolation are linked to poorer mental health and reduced wellbeing, with loneliness also associated with worse general health. While the study found no clear evidence of effects on specific physical health conditions, these potential impacts cannot be ruled out.
The findings suggest that loneliness, and potentially social isolation, remain important public health issues, particularly because of their links with mental health, wellbeing and overall health.
As loneliness becomes an increasingly important public health challenge, tackling it could bring benefits for both individuals and society.
Dr Zoe Reed, Research Fellow in the School of Psychology and Neuroscience at the University of Bristol, and corresponding author, said: “Our findings suggest that loneliness, and possibly social isolation, are still important public health concerns, especially for mental health and general health. Supporting people who feel lonely or socially isolated could help improve mental health, wellbeing and overall health.”
Lauren Bowes Byatt, Director of Nesta’s healthy life mission, added: “This research underlines that loneliness is likely to have a detrimental impact on our mental health and wellbeing. While this link may seem obvious, the topic has long been understudied. Studies like this can help to bridge this research gap and by understanding how loneliness or social isolation may be contributing to ill-health, we can get closer to new and more effective solutions.”
The researchers suggest more research is needed to understand exactly how loneliness and social isolation affect health and to develop the most effective ways to reduce their impact.
As the study focused on middle-aged and older adults, future studies should explore whether these patterns are similar in younger people. It will also be important to investigate the effects of persistent or long-term loneliness, as the study measured loneliness at a single point in time.
The paper’s findings add to growing evidence that loneliness and social isolation are not just social issues, they are important public health concerns with wide-ranging implications for wellbeing and mental and physical health. The research reinforces the importance of addressing these issues as part of public health policy and practice.
Journal
Nature Communications
Method of Research
Observational study
Subject of Research
People
Article Title
Investigating relationships between loneliness, social isolation and health
Article Publication Date
15-Jul-2026
Loneliness is making people sick. Doctors can't cure it alone
While loneliness has been shown to harm one's health, framing it as a health issue shifts responsibility from society to healthcare, even though healthcare alone cannot rebuild social ties, a new University of Michigan study warns.
The study, published in Social Problems, documents how chronic loneliness and social isolation gained traction as public health concerns once research linked them to higher risks of disease, death and rising healthcare costs.
Prior research discussed in the current study estimated that a lack of social connection is comparable to smoking 15 cigarettes a day. Another study found that social isolation, loneliness and living alone each raise the risk of premature death by roughly 30%. A third showed that beyond the physical toll, this experience may carry an economic price tag, costing Medicare an estimated $6.7 billion annually in elder care.
"Once people saw these findings, they began to treat loneliness as urgent," said U-M doctoral student Sofia Hiltner. "But it made me wonder: Why do we only consider problems important once they are tied to health?"
Hiltner interviewed experts and analyzed more than a decade's worth of media, medical journal articles and academic papers. She found that while linking loneliness to health gave the issue legitimacy, it also created what she calls a "logical leap"—the assumption that because a problem is related to health, the healthcare system should try to fix it.
"Not everything that relates to health belongs in healthcare," she said. "Doctors can screen patients and connect them to services, but they cannot rebuild communities or shorten work hours."
Hiltner, a predoctoral trainee in social demography at the Population Studies Center at U-M's Institute for Social Research, began studying loneliness after watching her grandmother become increasingly isolated later in life. When she started graduate school to study isolation among older people, she discovered clinical trials for a "loneliness pill". This experience raised questions about why loneliness is predominantly framed as a medical issue instead of a social one.
"After my grandfather died, my grandmother lived alone and there was little structure in her life," Hiltner said. "She didn't seem to have many friends or activities. It made me think about everything that happened throughout her life that led to that point. I wondered about the social policies, in addition to dynamics at the family level, that could have helped prevent that situation."
Cure may lie far outside the clinic
Hiltner's research also shows that members of the medical community did not initially want to claim loneliness as their responsibility. Instead, a mix of academic researchers, government health officials,and insurance companies pushed the issue into healthcare.
"There is the risk that defining loneliness as medical crowds out other ways of responding to the issue," she said. "Attention, time and resources are limited. On the other hand, framing it as medical may inspire more action than would have otherwise happened."
Hiltner hopes the study inspires policymakers to reflect on why they frame problems in certain ways and to consider upstream solutions.
"I would like them to reflect on the strengths and limitations of addressing problems through the healthcare system, and look farther upstream to understand how a problem emerges, considering ways to intervene before it occurs," she said. "Healthcare can help, but it can only go so far."
Study: The Medicalization of Loneliness: Addressing Social Ills Through Healthcare (DOI: 10.1093/socpro/spag034)
Journal
Social Problems
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