Studies have shown that behaviors are contagious and that our social networks can influence obesity, anxiety, and overall well being.

NY Times:

“I argue that the most powerful thing you can do to add healthy years is to curate your immediate social network,” said [Dan Buettner, a National Geographic fellow and author who studies the health habits of people who live in so-called blue zones], who advises people to focus on three to five real-world friends rather than distant Facebook friends. “In general you want friends with whom you can have a meaningful conversation,” he said. “You can call them on a bad day and they will care. Your group of friends are better than any drug or anti-aging supplement, and will do more for you than just about anything.”