"... Several studies, albeit small ones, show that social networks like Facebook, Twitter and Instagram can help bolster weight loss. Researchers in London recently analyzed 12 studies involving nearly 1,900 people in the U.S., Europe, East Asia and Australia. They found those who used social networking sites lost modest but significant amounts of weight. ..."
Read the entire article: http://www.npr.org/blogs/health/2014/10/06/353505527/social-media-the-new-weapon-in-the-battle-to-lose-weight