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Many people turn to doctors or self-help books, but they ignore a powerful thing that could help them fight illness: their friends.
Researchers are only now starting to pay attention to the importance of friendship in health. A 10-year Australian study found that old people with a large circle of friends were 22 percent less likely to die during the study period than those with fewer friends. A large 2007 study showed an increase of nearly 60 percent in the risk for obesity (肥胖) among people whose friends gained weight. And last year, Harvard researchers reported that strong social ties could improve brain health as we age.
“In general, the role of friendship in our lives isn't well realized,” said Rebecca, a professor at the University of North Carolina. “Friendship has a bigger effect on our psychological health than family relationships.”
While many friendship studies are about the close relationships of women, some research shows that men can benefit, too. In a six-year study of 736 middle-aged men, having friendships reduces the risk of heart attack. Only smoking was as important a risk factor (因素) as having little social support.
Exactly why friendship has such a big effect isn't entirely clear. While friends can send a sick person to the hospital or pick up medicine, the benefits go well beyond physical assistance. Friendship clearly has a big psychological effect. “People with stronger friendships feel like there is someone they can turn to,” said Karen, a doctor. "The message of these studies is that friends make your life better.”
