Social media and youth harm · Evidence guide
The social-media cases test product design, platform defenses and individual causation
Families allege that platform features encouraged compulsive use and harmed young people. The companies raised Section 230 defenses, while public-health evidence remains serious but nuanced.
What the lawsuits allege
The federal cases include allegations that social-media platforms were designed to maximize screen time and encourage compulsive use by adolescents, contributing to depression, anxiety and other mental-health injuries. These are allegations that vary by person and platform, not findings about every young user.
The cases are coordinated in MDL 3047 in the Northern District of California before Judge Yvonne Gonzalez Rogers. JPML listed 3,137 actions pending on August 3, 2026.
What the companies argued
On an early motion addressing selected claims, defendants argued that Section 230 barred all of the plaintiffs' priority theories. The court rejected both sides' all-or-nothing positions and analyzed whether each theory treated a platform as the publisher of another person's content.
The court allowed some theories to continue and applied Section 230 to others, including one theory about the timing and clustering of notifications carrying third-party content. That ruling addressed the pleadings and threshold defenses; it was not a finding that a platform caused a particular injury.
What the health evidence says
The Surgeon General's advisory describes both benefits and risks of social media for young people. It says the available evidence does not yet support a conclusion that social media is sufficiently safe for children and adolescents, while also identifying major gaps about which uses, content and individual circumstances matter most.
That is a public-health assessment, not a courtroom causation test. A particular case still requires evidence about the platform features used, timing, other influences on mental health and the claimed injury.
Verification ledger
Primary sources
Social Media Adolescent Addiction transfer order
The official description of centralized allegations.
MDL 3047, Document 1502, pages 1-3
Order on defendants' motion to dismiss
The court's treatment of Section 230 and selected product theories.
Document 430, pages 8-16 and 49-52
Social Media and Youth Mental Health
The federal public-health evidence advisory.
Key Takeaways · Evidence gaps
Pending MDLs by Actions Pending
The dated federal case-count snapshot.
PDF page 1, MDL 3047