California took a major step in its fight to protect children from the ills of social media with Gov. Gavin Newsom’s signature on a bill to limit the ability of companies to provide “addictive feeds” to minors.

Newsom on Friday signed Senate Bill 976, named the Protecting Our Kids From Social Media Addiction Act.

The bill was supported by state Attorney General Rob Bonta and groups such as the Association of California School Administrators, Common Sense Media and the California chapter of the American Academy of Pediatrics.

Newsom’s wife, First Partner Jennifer Siebel Newsom, is also outspoken about the links between social media consumption and low self-esteem, depression and anxiety among youth.

The legislation attracted an unusual collection of opponents, including the American Civil Liberties Union of California, Equality California and associations representing giants in the industry that own TikTok, Instagram and Facebook. The California Chamber of Commerce argued that the legislation “unconstitutionally burdens” access to lawful content, setting up the potential for another lawsuit in an ongoing court battle between the state and social media companies over use of the platforms by children.

“Every parent knows the harm social media addiction can inflict on their children — isolation from human contact, stress and anxiety, and endless hours wasted late into the night,” Newsom said. “With this bill, California is helping protect children and teenagers from purposely designed features that feed these destructive habits.”

The bill, which will take effect Jan. 1, 2027, with Newsom’s signature, prohibits internet service and applications from providing “addictive feeds,” defined as media curated based on information gathered on or provided by the user, to minors without parental consent. SB 976 also bans companies from sending notifications to users identified as minors between midnight and 6 a.m. or during the school day from 8 a.m. to 3 p.m. unless parents give the OK.

The bill will effectively require companies to make posts from people children know and follow appear in chronological order on their social media feeds instead of in an arrangement to maximize engagement. Proponents of the bill point to warnings from U.S. Surgeon General Vivek Murthy and others about a mental health crisis among youths, which studies show is exacerbated by social media.

“As a mother, I’m proud of California’s continued leadership in holding technology companies accountable for their products and ensuring those products are not harmful to children. Thank you to the Governor and Senator Skinner for taking a critical step in protecting children and ensuring their safety is prioritized over companies’ profits,” Siebel Newsom said.