# Loneliness Belongs on Your Health Checklist > Decades of research link social connection to longer life, on a scale comparable to well-known physical risk factors. In 2023, the US Surgeon General called it a public health priority. - Publication: New England Anti-Aging (https://newenglandantiaging.com) - Department: The Long Read - Label: Analysis - Section: Mind & Sleep - Author: Lena Whitcomb, Contributing Writer, Mind and Sleep - Published: 2026-10-12 - Lead photograph: Two older men walking together, by Centre for Ageing Better on Unsplash (https://unsplash.com/photos/two-older-men-walking-down-a-paved-road-6sv-RMFJ2ZU) - Canonical URL: https://newenglandantiaging.com/mind-sleep/loneliness-is-a-health-metric/ ## The Short Version - A meta-analysis of 148 studies found that people with stronger social relationships had about 50 percent higher odds of survival. - The 2023 Surgeon General advisory reported that about half of US adults experience measurable loneliness. - Social connection is modifiable, and small, regular commitments tend to work better than occasional big gestures. A routine checkup covers blood pressure, weight, cholesterol and maybe a depression screening. It almost never includes the question "How connected do you feel to other people?" The research suggests it should. ## The evidence In 2010, psychologist Julianne Holt-Lunstad and colleagues at Brigham Young University published a meta-analysis in [PLOS Medicine](https://doi.org/10.1371/journal.pmed.1000316) that pulled together 148 studies following more than 300,000 people. Across those studies, people with stronger social relationships had about 50 percent higher odds of survival over the follow-up period than people with weaker ties. The effect held across age, sex and health status. A [follow-up analysis in 2015](https://doi.org/10.1177/1745691614568352) separated the components. Social isolation, loneliness and living alone were each associated with meaningfully higher mortality, with increases in the range of roughly 25 to 30 percent. These are observational studies, so they cannot prove that loneliness directly causes earlier death. People who are ill may withdraw, and people who are isolated may have less access to care. Researchers try to adjust for those factors, and the association persists. Biological pathways are also plausible. Chronic loneliness is linked to elevated stress hormones, inflammation, disrupted [sleep](/mind-sleep/the-seven-hour-floor/) and less healthy behavior. > Isolation, loneliness and living alone were each associated with meaningfully higher mortality. ## A public health warning In 2023, then-Surgeon General Vivek Murthy issued an [advisory](https://www.hhs.gov/sites/default/files/surgeon-general-social-connection-advisory.pdf) calling loneliness and isolation an epidemic. The report noted that about half of US adults reported experiencing measurable levels of loneliness, and it summarized evidence linking poor social connection to higher risk of heart disease, stroke, dementia, depression and anxiety. It also compared the mortality impact of lacking social connection to smoking up to 15 cigarettes a day, a figure drawn from the meta-analytic research. The advisory documented a long decline in time Americans spend with friends in person, a trend that accelerated during the pandemic and has not fully reversed. ## Loneliness is not the same as being alone Researchers draw a useful distinction. Social isolation is objective. It describes how few contacts and interactions someone has. Loneliness is subjective. It is the painful gap between the connection a person wants and the connection they feel they have. Someone can live alone, see few people and feel content. Someone else can be married, employed and surrounded by colleagues and still feel deeply lonely. Both conditions carry risk, and they call for different responses. ## Who is most at risk Life transitions are common triggers. Retirement can remove daily structure and the casual social contact of a workplace. Moving to a new city, divorce, the death of a spouse, an empty nest and caring for a sick family member can all shrink a social world quickly. Hearing loss is an underappreciated factor, because people who struggle to follow conversation often withdraw from group settings. Treating hearing loss is one of the more practical steps toward staying connected. Chronic illness and pain also make it harder to get out and see people, which is one reason connection matters as part of medical care rather than as a separate social issue. ## What helps The Surgeon General's report and the broader research point toward a few approaches. Consistency beats intensity. A weekly walk with the same friend or a standing phone call with a sibling builds connection more reliably than an occasional large gathering. Shared activity lowers the barrier. Volunteering, classes, faith communities, sports leagues and walking groups give people a reason to show up and something to talk about. Many New England towns have senior centers, libraries and park programs that make this easy to start. Contribution matters. Helping others, whether through mentoring, volunteering or caregiving with support, is consistently associated with better well-being. Technology is a tool. Video calls can sustain relationships across distance, but research suggests passive scrolling is not a substitute for real interaction. Professional support is appropriate when loneliness overlaps with depression or anxiety, which is common. Talking with a clinician is a reasonable first step. Winter deserves its own plan. In New England, short days and cold weather make it easy to stay in for weeks at a time. Putting a few recurring commitments on the calendar in November, such as a class, a weekly dinner or a volunteer shift, keeps connection from depending on how motivated you feel on a dark Tuesday in January. ## Making it part of the plan Some primary care practices now ask about isolation during annual wellness visits, often with a three-question screening scale that takes under a minute. If yours does not, you can raise it yourself. It is a legitimate medical topic, and a clinician can point you toward options ranging from group exercise classes to senior center programs to counseling, depending on what is driving it. ## What the Evidence Doesn't Settle The research is observational, and illness can cause isolation as easily as isolation can harm health. The comparison to smoking 15 cigarettes a day is an analogy drawn from meta-analytic effect sizes, not a direct measurement, and some researchers argue it overstates the case. Trials of loneliness interventions have produced mixed results. ## Notes and Sources 1. Social Relationships and Mortality Risk, a Meta-analytic Review. PLOS Medicine, 2010. https://doi.org/10.1371/journal.pmed.1000316 2. Loneliness and Social Isolation as Risk Factors for Mortality, a Meta-Analytic Review. Perspectives on Psychological Science, 2015. https://doi.org/10.1177/1745691614568352 3. Our Epidemic of Loneliness and Isolation, the U.S. Surgeon General's Advisory on the Healing Effects of Social Connection and Community. U.S. Department of Health and Human Services, 2023. https://www.hhs.gov/sites/default/files/surgeon-general-social-connection-advisory.pdf --- Published by New England Anti-Aging, the health and longevity magazine of Align Wellness, 250 Centerville Rd, Building E, Warwick, RI 02886. General information only, not medical advice.