The U.S. Surgeon General's 2023 advisory on social media and youth mental health was carefully worded: the evidence is not yet sufficient to declare social media broadly safe, and there are 'ample indicators' of harm for adolescents — especially girls and those with pre-existing vulnerabilities. [1]
What's clearer is the dose-response signal. Adolescents who use social media for more than three hours a day show roughly double the risk of depression and anxiety symptoms compared to lighter users, after adjusting for confounders. [2]
Content matters as much as time. Passive scrolling through curated images correlates with worse body image and mood; active, interest-based use (messaging close friends, learning a craft, niche communities) shows neutral or even positive effects. The platform is not the only variable.
Practical guardrails the research supports: no phones in bedrooms overnight, a delayed start (ideally past early adolescence) for image-heavy platforms, and parents who model the same boundaries they ask for. Talk about the feeds, not just the screen time.