Meta Faces Landmark US Trial Over Youth Mental Health Claims

The California Trial and Its Stakes

Opening statements begin Tuesday in a landmark multistate jury trial in California against Meta, the parent company of Facebook and Instagram, which faces allegations that its platforms are deliberately designed to be addictive and harmful to young people’s mental health. The case, brought by 29 US states, could potentially cost Meta up to $1.4 trillion in damages, making it one of the most significant legal challenges to social media companies to date. The attorneys general leading the case argue that Meta has created platforms that exploit young users’ psychological vulnerabilities through features like continuous scrolling and algorithm-driven content prompts. They also express concern about how data from younger users is collected without proper consent from guardians. The trial represents a critical moment in the ongoing global debate about social media regulation and the responsibility of tech companies to protect their youngest users.

Specific Allegations and Demanded Reforms

The first four states to bring their case—California, Kentucky, Colorado, and New Jersey—will present their arguments beginning Tuesday, with jury selection already completed last week. The trial is expected to run approximately seven weeks, though unforeseen developments could extend this timeline. Beyond seeking financial damages, the attorneys general are demanding significant structural changes to Meta’s platforms, including implementing parental verification processes for teenage users, modifying what they describe as “dopamine-manipulating” algorithms, removing image filters for personal photos, forbidding multiple account creation, and eliminating disappearing messages and posts. Meta CEO Mark Zuckerberg and Instagram’s head are both expected to testify, marking Zuckerberg’s second court appearance this year following a February hearing in Los Angeles over similar allegations. In that earlier case, Meta lost a multimillion-dollar lawsuit brought by a young woman identified as KGM, with the verdict delivered in March.

Expert Perspectives on Potential Outcomes

Legal experts and child safety advocates view this case as potentially transformative for how social media platforms operate. Sonia Livingstone, a professor at the London School of Economics and director of the Digital Futures for Children Centre, told Al Jazeera that while it seems unlikely Meta would completely transform its business model or remake its feed entirely, the company will likely take steps to reduce the identified problems. She suggests Meta may focus more on moderation and tweaking the platform experience for users under 18. The 5Rights Foundation, a nonprofit focused on digital safety, emphasized that lawsuits like this can change tech company practices, but only when backed by clear rules that are consistently enforced with penalties substantial enough to impact corporate bottom lines. Julia Powles, executive director of the UCLA Institute for Technology, Law and Policy, told CNBC that California matters more than any other US jurisdiction because it’s where Meta faces the greatest legal reach and because the state is watched globally for its regulatory approach.

European Union and United Kingdom Actions

Beyond the United States, Meta faces significant regulatory pressure in Europe. The European Union is pursuing multiple legal cases against the company, covering antitrust rules for artificial intelligence on WhatsApp, child safety protections, and addictive platform features under the Digital Services Act. In 2024, EU regulators opened a formal investigation into Meta for potential breaches of online content rules relating to child safety on Facebook and Instagram. The European Commission expressed concern that algorithmic systems used for content recommendation could exploit children’s weaknesses and inexperience, stimulating addictive behavior. Last month, the EC published preliminary findings from a two-year investigation, concluding Meta is in breach of the DSA and calling for design changes to curb compulsive use. The EU specifically accused the company of designing Facebook and Instagram to be addictive and warned of hefty fines. In the United Kingdom, the government announced a sweeping ban on social media for those below 16 to take effect next year, with additional measures including potential overnight curfews and restrictions on infinite scrolling. Dame Rachel de Souza, England’s children’s commissioner, has called for even stronger restrictions, citing concerns about children being drawn into radicalization and violence online.

Global Regulatory Landscape

Other countries are also taking action against social media platforms. Australia imposed a social media ban for children under 16 in December 2025, but a recent study by the country’s internet regulator revealed that more than 80 percent of young teens and preteens are still using the platforms, with age verification systems proving ineffective. In Brazil, the Collective Defence Institute filed lawsuits seeking $525 million in damages against Meta, TikTok, and Kwai, accusing them of failing to implement safeguards against addiction and use by children. Brazilian regulators have also required platforms to link accounts of children under 16 to legal guardians and have suspended livestreaming features on Discord following an investigation into a teenager’s death. Kenya’s High Court ruled in April 2025 that it has jurisdiction to hear a $2.4 billion lawsuit against Meta, which claims Facebook’s algorithms amplified hateful content that fueled ethnic violence during the Ethiopia war. The case, brought by Ethiopian researchers and a Kenyan human rights organization, seeks to force Meta to change its algorithms, invest in African content moderation, and establish a restitution fund for victims. Meta also faces other civil lawsuits in Kenya, including one from former content moderation workers alleging exploitative working conditions.

Future Implications for Social Media

Rather than completely curtailing the power that social media platforms wield, legal action will likely force them to reform certain features and implement more rigorous age checks, experts say. This could significantly alter the look and feel of social media platforms globally. Livingstone warned that unless platforms start adjusting their design, public tolerance will reach its limits, potentially leading to more restrictive bans. She predicted the market might diversify, with users moving toward platforms less premised on personalized algorithmic feeds, which she described as addictive and harmful. The outcome of the California trial, while unlikely to be final given expected appeals, could set important precedents for how social media companies must protect young users. With additional trials scheduled, including a separate case involving 14 more US states set for February 2027, the pressure on Meta and other platforms continues to mount. The combination of US litigation, European regulation, and actions in countries like Australia, Brazil, and Kenya suggests a global shift toward holding tech companies accountable for their impact on children’s mental health and well-being.