San Francisco, California - Dozens of states on Tuesday accused Facebook and Instagram owner Meta of profiting "from children's pain," damaging their mental health and misleading people about the safety of its platforms.

"In seeking to maximize its financial gains, Meta has repeatedly misled the public about the substantial dangers of its Social Media Platforms," argued a joint lawsuit filed in federal court in California.

In total, more than 40 states are suing Meta, though some opted to file in local courts rather than join in the federal case.

Meta has exploited young users by creating a business model designed to maximize the time they spend on the platform despite harm to their health, the legal filing argued.

"Kids and teenagers are suffering from record levels of poor mental health, and social media companies like Meta are to blame," said New York Attorney General Letitia James in a statement announcing the suit.

"Meta has profited from children's pain by intentionally designing its platforms with manipulative features that make children addicted to their platforms while lowering their self-esteem."

The suit accuses Meta of deceptive and unlawful conduct, harming vulnerable youth for financial gain. The suit urges the federal court to order Meta to stop manipulative tactics and pay hefty financial penalties along with restitution, according to James.

"Social media companies, including Meta, have contributed to a national youth mental health crisis, and they must be held accountable," James said.

Meta said it was "disappointed" by the suit and that the states were not working with the array of social media companies to create age-appropriate standards.

Meta maintained that it has developed more than 30 tools in its apps to support teenage users and made it easier for parents to "shape" online activity.

The Silicon Valley tech firm contended it is disappointing that attorneys general have singled out Meta instead of seeking industry-wide solutions given the popularity of rivals including TikTok, YouTube, and Snapchat.

Social media can also be a place where young people struggling with other issues in their lives go to find support of community, Meta maintained.

The legal complaints resulted from a nationwide investigation announced in November of 2021, according to California attorney general Rob Bonta.

"Our bipartisan investigation has arrived at a solemn conclusion: Meta has been harming our children and teens, cultivating addiction to boost corporate profits," Bonta said in a release. "With today's lawsuit, we are drawing the line."

The investigation was launched after Facebook whistleblower Frances Haugen leaked more than 20,000 pages of internal documents to the media that sparked criticism that the social media giant had put profit before the security of its users.

During testimony to American and European lawmakers in 2021, she insisted that Facebook failed to curtail toxic content and that the company cannot be trusted to change its ways.

Facebook later that year changed its name to Meta in a move critics suspected was intended to distance the company from its social networking controversies.

Meta chief executive Mark Zuckerberg defended the company at the time, saying that "the argument that we deliberately push content that makes people angry for profit is deeply illogical."