Your people are part of your health.
What the research found
A widely cited meta-analysis combined 148 prospective studies and more than 300,000 participants. It found that stronger social relationships were associated with better odds of survival. The authors reported an average 50% greater likelihood of survival among people with stronger relationships. That is a group-level association across varied studies, not a promise that making one new friend changes an individual's lifespan by 50%.
The review is from 2010, so it is a landmark rather than the last word. Social connection is difficult to measure, and health can affect relationships as well as relationships affecting health. Read the original PLOS Medicine meta-analysis.
Connection is more than “be social”
Research looks at different things: the size of someone’s network, how often they interact, whether support is available, and whether they feel lonely. Those are related, but not identical. Someone can enjoy plenty of solitude and still have meaningful support; someone else can feel lonely in a crowded room. The goal is not to prescribe a personality type.
Try a small, specific invitation instead of “we should hang out sometime”: a weekly walk, a shared meal, a game night, a call on the commute, or volunteering around something you care about. Repeated low-pressure contact can make connection easier to sustain.
Make room for different seasons
Work, disability, caregiving, grief, language, money, distance, and social anxiety can all make connection harder. Online groups can be real support; so can one trusted person. If isolation or loneliness is weighing on your wellbeing, a clinician, counselor, community organization, or peer-support group can help you find a next step.
Connection supports health and quality of life, but it is not a substitute for medical care and no one should be blamed for circumstances that limit social contact.
Tiny experiment
Send the low-pressure text.
Source and interpretation
Holt-Lunstad J, Smith TB, Layton JB. “Social Relationships and Mortality Risk: A Meta-analytic Review.” PLOS Medicine (2010). doi:10.1371/journal.pmed.1000316. This is observational evidence synthesized across studies; it cannot isolate every pathway or guarantee cause and effect for an individual.