Safe spaces or toxic places? Content moderation and social dynamics of online eating disorder communities

Compares eating-disorder discussions across Twitter/X (2.6M tweets), Reddit (178K submissions), and TikTok (14K videos) from 2019–2023. Users engage similarly in seeking support everywhere, but platforms with weaker moderation enable toxic echo chambers that amplify pro-anorexia rhetoric — evidence that moderation strategy significantly shapes how self-harm-adjacent communities develop.