Social media use might affect the mental health and life satisfaction of young girls earlier than it does for boys. In a new study published in the journal Nature Communications, psychologists at the University of Cambridge analyzed data from about 84,000 British people between 10 and 80 years old. They found that girls who increased their time on social media between the ages of 11 and 13 were less satisfied with their lives one year later. That same trend occurred in boys, but at ages 14 and 15. They believe that while not proving social media harms wellbeing, this study shows how social media can affect life satisfaction, with different windows of vulnerability for boys and girls.