Healthy relationships are a vital component of health and wellbeing. There is compelling evidence that strong relationships contribute to a long, healthy, and happy life. Conversely, the health risks from being alone or isolated in one's life are comparable to the risks associated with cigarette smoking, blood pressure, and obesity.
Research shows that healthy relationships can help you:
A review of 148 studies found that people with strong social relationships are 50% less likely to die prematurely. Similarly, Dan Buettner’s Blue Zones research calculates that committing to a life partner can add 3 years to life expectancy (Researchers Nicholas Christakis and James Fowler have found that men’s life expectancy benefits from marriage more than women’s do.)
Deal with stress
The support offered by a caring friend can provide a buffer against the effects of stress. In a study of over 100 people, researchers found that people who completed a stressful task experienced a faster recovery when they were reminded of people with whom they had strong relationships. (Those who were reminded of stressful relationships, on the other hand, experienced even more stress and higher blood pressure.)
Research indicates that strong relationships contribute to health at any age. According to research by psychologist Sheldon Cohen, college students who reported having strong relationships were half as likely to catch a common cold when exposed to the virus, while an AARP study with older adults found that loneliness is a significant predictor of poor health. More generally, a 2012 international Gallup poll found that people who feel they have friends and family to count on are generally more satisfied with their personal health than people who feel isolated.
Moreover, hanging out with healthy people increases your own likelihood of health—in their book Connected, Christakis and Fowler show that non-obese people are more likely to have non-obese friends because healthy habits spread through our social networks.
A survey by the National Bureau of Economic Research of 5,000 people found that doubling your group of friends has the same effect on your wellbeing as a 50% increase in income!