Global Screen Time Linked to Millions of Years Lost to Mental Illness, Study Finds

Excessive screen time, particularly social media scrolling, is associated with millions of years of life lost to mental illness and other health issues globally, according to a major review published in The Lancet.

Researchers found that spending more than two hours daily on screens is linked to poorer mental health and increased rates of depression. This could be because extensive screen use displaces essential activities like sleep, exercise, and face-to-face social interactions. Additionally, users are exposed to addictive platform features designed to prolong engagement.

The review, which analyzed data from 121 studies involving 9 million young adults, suggests that screen use, including platforms like Instagram and TikTok, is also responsible for an estimated 240,000 years lost to obesity worldwide. An international team of experts attributes the rise in mental health problems, sleep disorders, and physical inactivity among young people to increasingly online lives.

Scientists involved in the review criticized technology companies for treating global health as an "afterthought" and called for coordinated international action to mitigate risks. They urged for the disclosure of the health impacts of specific "addictive" features.

"Use of digital media is now woven into the fabric of childhood and life as a young adult," stated Professor Ilona Kickbusch, who led the review. "Governments have let technology companies write their own rules, leading to business models built to capture attention and collect data, with health treated as an afterthought."

The review found consistent links between problematic, addiction-like screen use and a range of health concerns, including anxiety, depression, poor sleep, and neurodevelopmental conditions like ADHD and autism. These findings echo earlier research, including a study in JAMA Pediatrics that linked higher screen use to poorer academic performance and increased risk of emotional and language difficulties in children.

While platforms like Instagram and TikTok have introduced parental controls and age-verification measures, the review's authors argue these are insufficient. They advocate for regulation by a dedicated international body to monitor harms to children and young people, and for governments to act proactively.

Young adults involved in the review emphasized the preventability of these health risks. "With better governance and by empowering young people to help shape digital systems around us, the online world can give us connection, information and opportunities without putting our health at risk," said Dr. Salman Fitrat Khan, a junior medical doctor and member of the review group. "Governments shouldn't wait for 'perfect' evidence before acting for our generation and the ones coming after us."

External experts acknowledged the review's significance but noted the need for further research to definitively establish cause and effect. Professor Alan Woodward, an expert in cybersecurity, commented that while calling for precautionary action is legitimate, any government intervention requires built-in evaluation to determine effectiveness. Dr. Teodora Gliga, a neuroscientist, stressed the necessity of a public health approach to limiting exposure, given the rapid evolution of digital media that can render research obsolete.