A new study published in the journal JAMA Psychiatry indicates that teenagers who spend over three hours per day on social media have an increased chance of developing mental health problems such as anxiety and depression, whilst also being more prone to aggression and anti-social behaviour.

Aggression and anti-social behaviour were effectively non-existent among the teenagers who reported as not using social media. Some 6,600 12 to 15-year-old Americans were consulted for the study. The study found, even after adjusting for a history of mental health problems, that three hours of social media use correlated with increased rates of mental health issues.

Kira Riehm, the lead author of the study and PhD student at Johns Hopkins University, warned against allowing teenagers to overuse social media.