Across nine million lives and 121 studies, a pattern has emerged that thirteen researchers felt compelled to name aloud: the digital environments young people inhabit were not designed with their wellbeing in mind. Published in The Lancet, their assessment places this moment in a longer history of industries that shaped public life before public governance could catch up — and calls on the world's institutions to close that gap before another generation absorbs the cost. The question they raise is not whether technology is good or bad, but who gets to decide what it does to us.
Global experts call for coordinated action on digital media health risks to youth
Excessive screen time could be associated with approximately 2.8 million healthy years of life lost to depression and 240,000 to obesity worldwide annually.
Governments have let technology companies write their own rules
Mark
So the core claim here is that digital platforms are making young people sick. But the paper itself says the evidence is low-certainty. How do we square that?
Mimi
The certainty is low about the precise mechanisms and the exact size of the effect, but the consistency across 121 studies of nine million people is hard to ignore. They're not saying "we proved it." They're saying "the pattern is real enough, and the stakes are high enough, that we need to act while we learn more."
Luke
But let's be precise about what they actually found. The associations are modest. And the biggest numbers—the 2.8 million healthy years lost—those are estimates based on low-certainty evidence. They're illustrative, not measured. That's important to say out loud.
Mark
Why can't we just measure this directly? Why is the data so hidden?
Mimi
Because the platforms own it. They know exactly how their algorithms affect engagement, mood, sleep patterns—they have that data. But they don't share it with independent researchers. So scientists have to work backward from what people report about their own behavior, which is always messier and less precise.
Luke
And that's actually the most damning part of the series, I think. Not that platforms are definitely harming kids, but that we can't even know because companies won't open their books. That's a governance failure, not a science failure.
Mark
The paper mentions a "corporate defense playbook" borrowed from tobacco. That's a strong comparison. Is it fair?
Mimi
The tactics are identical: manufacture doubt, attack the credibility of researchers, frame regulation as censorship or a threat to innovation. The playbook works because it shifts the burden of proof onto regulators instead of onto the companies making the products.
Luke
Though I'd note: the tobacco industry was hiding evidence of direct, measurable harm. Here we're talking about modest associations with low certainty. The comparison is rhetorically powerful, but the evidence landscape is genuinely different. That doesn't mean we shouldn't act—it means we should be clear about what we're acting on.
Mark
What would actually change if these recommendations happened?
Mimi
Companies would have to prove their products are safe before launching them, not after. They'd have to share data with researchers. There'd be international baseline standards so one country's weak rules don't undermine another's. And there'd be someone watching AI specifically.
Luke
But here's the gap: we don't know if those changes would actually reduce harm, because we don't have a control group. We're designing policy based on reasonable assumptions about how regulation works, not on evidence that these specific interventions will fix the problem.
Le Pouls
- An umbrella review of 121 studies covering nine million young people links addiction-like digital media use to depression, poor sleep, and physical inactivity — though the evidence remains modest and causation unproven.
- The most critical data about how platforms actually shape user behavior sits locked inside company servers, keeping independent science in the dark and public health policy guessing.
- Features like infinite scroll and autoplay are not accidents — they are deliberate engineering choices built to capture attention, and researchers argue the entire digital environment has been optimized for commercial growth at the expense of health.
- Even a small individual risk, scaled across a global youth population, could translate to roughly 2.8 million healthy years of life lost to depression and 240,000 to obesity annually — figures the authors call illustrative but urgent.
- The series calls for WHO governance treaties, mandatory pre-release health assessments for digital products, and compelled data sharing with independent researchers to establish the safety standards that self-regulation never delivered.
Across nine million lives and 121 studies, a pattern has emerged that thirteen researchers felt compelled to name aloud: the digital environments young people inhabit were not designed with their wellbeing in mind. Published in The Lancet, their assessment places this moment in a longer history of industries that shaped public life before public governance could catch up — and calls on the world's institutions to close that gap before another generation absorbs the cost. The question they raise is not whether technology is good or bad, but who gets to decide what it does to us.
Thirteen researchers publishing in The Lancet have delivered a coordinated warning: the digital world young people inhabit today was built almost entirely around commercial interests, and the health consequences are becoming measurable. Led by Ilona Kickbusch of Switzerland's Digital Transformations for Health Lab, the three-paper series argues that governments have allowed technology companies to govern themselves for decades — and that the bill is coming due.
The evidence draws on 121 studies covering nine million people under 25. Researchers found consistent associations between problematic digital media use — defined by addiction-like engagement patterns rather than time alone — and higher rates of depression, disrupted sleep, and reduced physical activity. Some benefits emerged too: moderate use correlates with higher well-being, and active video gaming shows links to healthier outcomes. But the authors are candid that the associations are modest and the certainty low. Cause and effect remain difficult to establish, in part because the richest data about platform behavior stays locked inside company servers, inaccessible to independent science.
To convey what even small risks mean at scale, the series estimates that if more than two hours of daily screen time carries a modest depression risk, the global toll could reach 2.8 million healthy years of life lost annually — with 240,000 more lost to obesity. The authors frame these as illustrative, not precise, but argue the magnitude alone justifies urgent action.
The series draws a deliberate parallel to tobacco and fossil fuel industries, accusing technology companies of manufacturing doubt, discrediting critics, and framing regulation as a threat to freedom. Barbara Prainsack of the University of Vienna pushes back on that framing: good regulation does not stifle innovation, it directs it toward safety. Without it, companies simply become the rule-makers by default.
The researchers call for mandatory health assessments before new digital products are released, compelled data sharing with vetted independent researchers, and a WHO-led global governance treaty to set baseline safety standards across borders. A dedicated international body to monitor AI harms to youth is also proposed. Litigation, they note, is emerging as a pressure valve — forcing disclosure of internal documents — but cannot replace systemic governance.
A Youth Advisory Group contributed to the series, and one member, Salman Fitrat Khan from India, offered the clearest moral frame: the harms are preventable. With genuine governance and young people included in shaping the systems around them, the digital world can offer connection and opportunity without extracting health as the price of admission.
Thirteen researchers from across the globe have published a stark assessment in The Lancet: the digital world as it exists today—shaped almost entirely by the commercial interests of a handful of technology companies—poses measurable risks to the health of children and young people, even as it offers genuine benefits. The three-paper series, led by Ilona Kickbusch of the Digital Transformations for Health Lab in Switzerland, argues that governments have abdicated their responsibility to govern these systems, allowing companies to write their own rules for decades.
The evidence comes from an umbrella review spanning 121 separate studies and covering nine million people under 25. The researchers found consistent links between what they call "problematic digital media use"—defined not simply by time spent online, but by addiction-like patterns of engagement—and a range of health harms. Young people showing these patterns experience higher rates of depression and other common mental health problems, worse sleep, and lower levels of physical activity. The review also identified some benefits: moderate digital media use correlates with higher well-being, and active video gaming is associated with both better mental health and healthier lifestyles overall.
But the researchers are careful about what their findings actually prove. The associations they found are modest in size and rest on evidence of low certainty—meaning the data cannot yet establish direct cause and effect. Louise Holly, one of the series authors, points to a critical gap: the most valuable information about how platforms actually affect users remains locked inside technology company servers, unavailable to independent researchers. Without access to that data, scientific progress slows and public health decisions must be made in the dark.
To illustrate what even small individual risks might mean at a population scale, the authors estimated that if more than two hours of daily screen time carries even a modest increased risk for depression and obesity, the global toll could reach approximately 2.8 million healthy years of life lost to depression each year, and 240,000 to obesity. The authors themselves caution that these figures are illustrative, not precise measurements, and that more rigorous research is needed. But the scale they suggest—even accounting for uncertainty—is large enough to warrant immediate action.
The problem, the series argues, lies not in individual willpower but in how platforms are deliberately engineered. Features like infinite scroll, autoplay, and personalized recommendation feeds are not accidental byproducts of technology; they are intentional design choices built to capture attention and harvest data. Technology companies have prioritized commercial growth over health for so long that the current digital environment reflects their interests almost exclusively. Jay Shaw of the University of Toronto notes that research has focused too heavily on how much time people spend online, when the real question is how specific design features shape behavior in the first place.
The authors draw a parallel to tactics used by the tobacco and fossil fuel industries: technology companies manufacture doubt about harms, discredit critics, and frame regulation as a threat to freedom. Barbara Prainsack of the University of Vienna argues that this framing misses the point. Good regulation is not the enemy of innovation; it channels innovation toward safety and trust. When regulation is absent, companies simply become the rule-makers instead of public policy.
The series calls for action at multiple levels. Technology companies should be required to assess new products for health harms before release and to share data on how their features affect users with vetted independent researchers. Governments should establish a global governance treaty through the World Health Organization to set baseline safety standards, preventing weak regulation in one country from undermining progress elsewhere. A dedicated international body should monitor artificial intelligence harms to young people specifically. The authors also acknowledge that litigation is emerging as a tool to hold companies accountable—forcing disclosure of internal documents and shifting responsibility—though they emphasize that lawsuits cannot substitute for regulation.
The series included input from a Youth Advisory Group of six young adults ages 23 to 30, recognizing that research cannot capture the full texture of lived experience. One member, Salman Fitrat Khan from India, emphasized that the harms are preventable. With better governance and by empowering young people to help shape the digital systems around them, the online world can deliver connection, information, and opportunity without substantial risk to health. Governments, he argued, should not wait for perfect evidence before acting for this generation and those to come.
Citations marquantes
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.— Ilona Kickbusch, series chair, Digital Transformations for Health Lab
The health risks and harms associated with digital systems are preventable. With better governance and by empowering citizens—especially young people—to co-shape digital systems around them, the online world can give us connection, information and opportunities without putting our health at risk.— Salman Fitrat Khan, Youth Advisory Group member
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