What the review found
A three-paper series in The Lancet argues that the way digital technologies are built and governed creates real health risks for children and young people, and that governments should act now rather than wait for perfect evidence. The papers were written by 13 experts from 10 countries and draw on research covering data from about 9 million people under 25.
A related umbrella review looked at 2,790 studies. It found consistent links between problematic digital media use, meaning addiction-like patterns rather than screen time alone, and depression, anxiety, sleep disruption, self-harm and lower physical activity. Short-sightedness and other physical effects also appeared. The authors stress that many of these are associations rather than proven causes, and that digital tools bring clear benefits as well.
Where responsibility sits
The series says the burden of keeping young people safe should shift from children and families to technology companies and governments. It proposes treating digital systems as structural determinants of health, in the same category as housing or pollution, and calls for coordinated rules on product design, data use and advertising aimed at minors.
The authors point to gaps in the evidence and argue that waiting for long-term studies is not a neutral choice, because exposure keeps growing. The series also included a youth advisory group of six adults aged 23 to 30, whose accounts shaped the recommendations.
What could change next
Policy ideas in the papers include stricter age checks, limits on features designed to hold attention, transparency about recommendation systems and independent audits of platforms. Some countries have already passed rules along these lines, and the authors say the next step is to test whether they work and to compare results across borders.
Researchers add that simple screen-time limits are not enough. The evidence points to design and patterns of use, which means school phone bans or daily hour caps may miss the problem. Regulators, paediatricians and platform engineers will now argue about which measures to try first, and how to tell whether they help. For parents, the practical guidance is to watch how a child uses an app, not only how long.