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High Social Media Use Increases Mental Health Risks for Adolescents

The decade-long study found 12- to 13-year-olds faced higher depressive symptoms after two hours a day online, with girls affected most.

  • A decade-long study of nearly 1,200 Melbourne children published Friday in the Medical Journal of Australia links heavy social media use to poorer mental health, the Murdoch Children's Research Institute reported.
  • Researchers identified ages 12 to 13 as a critical vulnerability window, noting that rapid pubertal brain development makes early adolescents hypersensitive to social status, peer acceptance, and exclusion.
  • Data shows that girls aged 12 to 13 face the highest risk, with 11 additional cases of high depressive symptoms per 100 adolescents when spending more than 2 hours daily online.
  • These findings arrive six months after Australia implemented a world-first ban for under-16s, though critics argue the restrictions remain difficult to enforce as about 70 per cent of children continue using accounts.
  • To monitor how platform age-gates influence long-term mental health, researchers launched the Connected Minds Study, emphasizing a balanced preventive framework including digital literacy initiatives.
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Sydney Morning Herald broke the news in North Sydney, Australia on Thursday, June 11, 2026.
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