A large study of middle-aged adults links being both lonely and cut off from others to fewer years free of depression and anxiety, with men losing the most.
Story Highlights
- Researchers followed 277,489 adults aged 40 to 69 who had none of seven major illnesses when the study began.
- Men who were both lonely and isolated had about 5.8 fewer years free of depression or anxiety, counted from age 50.
- Women in the same spot had about 3.7 fewer such years.
- The study shows a link, not proof of cause, and it does not replace advice from your own doctor.
What the Study Found
Researchers at Tulane University reported on Thursday, August 20, 2026, in the journal Nature Communications that people who were both lonely and socially isolated lived fewer years free of major disease. The aim was to see how a person’s social life lines up with healthy years after midlife. The team used health records from the UK Biobank, a large British database that tracks the health of volunteers over many years.
Every person in the study was free of seven conditions at the start: diabetes, heart disease, lung disease, dementia, cancer, depression and anxiety. That screening matters. It means the people did not begin the study already sick. Compared with people who were neither lonely nor isolated, men with both lost about 5.8 years free of depression or anxiety, and women lost about 3.7. For physical disease, women with both lost 2.4 healthy years and men lost 1.7.
Lonely and Isolated Are Not the Same Thing
The researchers drew a clear line between two ideas. Social isolation means having few social contacts, which can be counted. Loneliness is a feeling: being unhappy with the quality of your relationships, no matter how many people are around. A person can live alone and feel fine, or sit in a full room and feel alone.
“Overall, the study found that social isolation and loneliness can have a significant impact on disease-free life expectancy,” said Lu Qi, the Tulane professor who led the work. He also said, “Our research found men are more susceptible to being affected by loneliness.” The study is observational, which means it tracked people and found a pattern. It did not test whether changing one thing changes the outcome. The team plans clinical trials to test that, and to study other groups of people.
What Helped, and What Didn’t
One finding stands out. Healthy habits, such as a good diet, exercise, sleep and not smoking, cut down the healthy years lost that were tied to isolation. Those same habits did not do much for the years tied to loneliness. The researchers said the two may need different kinds of help.
Loneliness is hard, and it is rarely fixed by deciding to feel different. For some men, the first step that is fully in their own hands is small: a text, an email or a phone call to someone they would like to hear from. For anyone dealing with low mood, worry or poor health, the right person to talk with is a doctor. Many medical conditions can affect mood and energy, and this study is not a substitute for that care.
Sources:
pmc.ncbi.nlm.nih.gov, biobank.ndph.ox.ac.uk, sph.tulane.edu