Prohibits social media platforms from promoting certain practices or features of eating disorders to child users.

New Jersey's S 4153 prohibits social media platforms from using designs, algorithms, or features that could cause child users (under 18) to develop eating disorders, including promoting diet products. The bill requires larger platforms to conduct quarterly internal audits and annual third-party audits of their content algorithms to prevent harmful practices, with exemptions for businesses with under $100 million in annual revenue. Platforms are not liable for user-generated content, third-party content, or content protected under federal law (Section 230) or constitutional protections. Violations could result in civil penalties up to $250,000 per incident. The law applies to platforms meeting specific social networking criteria, excluding business communication tools and content-heavy services like news or e-commerce sites.