Being alone and feeling lonely are distinct states, and a new study reveals the perception of loneliness carries a heavier health burden than objective isolation.
The Cornell University research, published in JAMA Network Open, analyzed data from 7,845 adults over 50 in England over 13.6 years. It found a mismatch between actual social circumstances and feelings of loneliness-labeled 'social asymmetry'-was linked to increased risk of death, cardiovascular disease, and chronic lung disease.
Participants who felt lonelier than their social network suggested, termed 'socially vulnerable,' faced the highest risks. Those who were isolated but did not feel lonely, 'socially resilient,' showed little increased risk.
'Connection alone isn’t the whole story,' said co-author Anthony Ong, a psychology professor at Cornell. 'Two people can have similar social circumstances and face very different health trajectories.'
A separate study in Nature Communications Psychology found people with chronic loneliness perceive interactions as threatening, leading to withdrawal and a difficult-to-break cycle.
In response, medical professionals are increasingly adopting 'social prescribing.' This approach links patients to non-medical community activities like walking groups or volunteering to address social determinants of health. The World Health Organization notes one in five primary care visits involve non-clinical issues like loneliness.
The United Kingdom has embedded social prescribing in national health policy, with over 1 million referrals annually. From March 2026, its National Academy for Social Prescribing will become a WHO Collaborating Centre to support global policy development.