WASHINGTON, 26 January 2026 — Meta Platforms, TikTok and YouTube will face a landmark courtroom test this week, as a California trial examines allegations that their platforms contributed to youth addiction and mental health harm.
The bellwether case, to be heard in Los Angeles County Superior Court, centres on a 19-year-old California woman identified as K.G.M., who claims she became addicted to the platforms at a young age due to their attention-grabbing design features. According to court filings, she alleges the apps fuelled her depression and suicidal thoughts and is seeking to hold the companies legally responsible.
The lawsuit is the first of several “social media addiction” cases expected to go to trial this year and marks the first time major technology firms must defend such claims before a jury, rather than lawmakers.
“They will be under a level of scrutiny that does not exist when you testify in front of Congress,” said Matthew Bergman, the plaintiff’s attorney.
A Test Case for Social Media Liability
Jurors will be asked to determine whether the companies were negligent in offering products that harmed K.G.M.’s mental health, and whether her use of the platforms was a substantial factor in her condition, compared with other influences such as third-party content or offline circumstances.
“This is really a test case,” said Clay Calvert, a media law expert at the American Enterprise Institute. “We’re going to see what happens with these theories” that social media platforms caused the alleged harm.
Mark Zuckerberg, chief executive of Meta, is expected to testify. Meta’s lawyers have said the company will argue that its products did not cause K.G.M.’s mental health challenges.
Snap, whose CEO Evan Spiegel was also expected to testify, agreed on Jan 20 to settle the lawsuit, though details were not disclosed.
YouTube executives have said the platform will argue it should not be grouped together with social media apps such as Instagram and TikTok, citing fundamental differences in how the service operates. TikTok declined to comment on its legal strategy.
Public Campaign to Reassure Parents
As the trial unfolds, the companies are simultaneously ramping up public-facing initiatives aimed at convincing parents and regulators that their platforms are safe for teenagers.
Meta has sponsored parent workshops on teen online safety at dozens of US high schools since at least 2018. In 2024, it hosted a “Screen Smart” event in Los Angeles alongside National PTA president Yvonne Johnson and Meta safety chief Antigone Davis.
TikTok has backed similar programmes through more than 100 local and regional PTAs under its “Create with Kindness” initiative, which includes tutorials for parents on features such as nighttime screen-time limits.
YouTube’s parent, Google, has partnered with the Girl Scouts, offering educational programmes on digital safety that allow participants to earn a badge featuring Google’s logo.
The companies have also retained legal teams experienced in high-profile addiction-related litigation. Meta’s lawyers include attorneys who previously represented McKesson in opioid-related cases, while TikTok’s counsel has represented Activision Blizzard and Microsoft in disputes involving video game design and addiction.
“These companies are using every lever of influence that you can imagine,” said Julie Scelfo, founder of Mothers Against Media Addiction. “It can be very confusing for parents who to trust.”
