Does loneliness affect lifespan?

Longevity conversations focus on diet and exercise, but one of the strongest predictors of survival is the quality of your relationships.

What the research shows

A 2010 meta-analysis pooled 148 studies with more than 300,000 participants. People with stronger social relationships had about 50% greater odds of survival over an average follow-up of 7.5 years. The researchers noted the effect size was comparable to well-established risk factors like smoking and physical inactivity.

A follow-up meta-analysis in 2015 looked at 70 studies and found increased mortality risk associated with:

• Social isolation: about 29% higher risk
• Loneliness: about 26% higher risk
• Living alone: about 32% higher risk

These are observational findings, so they show association rather than proof of cause, but the pattern is consistent across many populations.

Why connection matters for health

Chronic loneliness is associated with higher stress hormones like cortisol, poorer sleep, higher blood pressure and inflammation. Social ties also shape behavior: people with support networks tend to exercise more, eat better and get medical care sooner.

Simple ways to build connection

• Schedule a weekly call or meal with someone you care about.
• Join a group activity — a walking club, class or team.
• Volunteer; helping others is linked to better wellbeing.
• Put phones away during shared time.

Connection also builds resilience to stress. For more daily habits linked to healthy aging, read our longevity habits guide, or take the wellness assessment for a personalized plan.

If loneliness feels persistent or comes with low mood, talking with a healthcare professional is a strong, practical step.