Using online social networks such as Facebook has become part of the daily routines of hundreds of millions of people around the world. As prior research has shown, a number of psychological benefits can indeed be derived from using online social networks. However, across five studies we demonstrated that using the currently most popular and prominent social network (Facebook) may have a detrimental effect on consumers’ self-control. We found that greater Facebook use is associated with poor self-control in a number of important domains: health (studies 3 and 5), mental persistence (study 4), and spending/finances (study