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Key takeaways
- Long-term studies link strong friendships with slower aging, better brain health and longer life.
- Social benefits show up even in small or brief interactions, including casual or virtual contact.
- Making friends can get harder with age, but research suggests it is still possible at any stage.
Lawrence Seiger’s wife died when he was 62. Their four kids had left home by then. He retired from his job selling life insurance. And he drifted away from the friends in his squash club.
Those were big changes for him, says Seiger, who lives near Gary, Indiana. Until then, he says, “I always had other people around in my life.”
Then he got married again. “And my wife is so entertaining, she’s worth 20 friends.” She has an army of friends herself. “We’re friends with her friends,” Seiger says.
They bought a condo in Mackinaw City, Michigan, where they gather with neighbors for dinners and community happy hours. And “when I walk the dogs, you’re always meeting other dog walkers.”
Being social in these ways “takes you out of your own self. You’re thinking about others and their welfare,” says Seiger, who is 93. “I’m sure it’s added years to my life.”
That’s not hyperbole. Among the many other activities that keep him busy, Seiger is among a group of “super agers” — people 80 or older whose brains test at levels typical among subjects 20 or 30 years younger — being studied by scientists at Northwestern University.
What such super agers have in common, these researchers report after 25 years of study, isn’t diet or exercise or getting enough sleep. It’s having friends.
“Whenever people talk to me about super aging, they ask, ‘OK, what’s the recipe?’ ” says Sandra Weintraub, a clinical neuropsychologist at the Northwestern University Feinberg School of Medicine and coauthor of the project’s most recent report, published last summer. The answer: “The one observation that could be generalized was the gregariousness of the participants.”
Friendships, in other words, are good for you. And a slew of new research about the connection between socializing and well-being is discovering the same thing.
Another study, published in October 2025 by scientists at Cornell, Stony Brook and Harvard universities, concludes that the effects of aging are slower in people who have experienced lifelong family, community, religious and emotional connections.
On average, this study found, people who have had these kinds of strong social connections live four years longer, to a median of 84, versus 80 for people who don't.
“Their cells, in effect, are ticking more slowly than their chronological age would suggest,” says Anthony Ong, a professor of psychology at Cornell and one of the study’s coauthors. They have fewer health problems and less trouble with activities such as walking or climbing, Ong and his colleagues found, and lower levels of a protein tied to heart disease and cognitive decline.
On the other hand, the discovery that social connections matter, beginning in childhood, doesn’t necessarily mean people are locked into their fates from birth, he says.
“There's real room to invest in connections at any age,” Ong says.
These new results follow earlier studies that found even momentary social interactions with friends reduce fatigue and stress among older adults; that frequent social activity reduces cognitive decline by an average of 70 percent and slows physical disability; and that friendships later in life can reduce a person’s risk of dementia, depression and physical decline.
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