TikTok Attempts to Rein In Weight Loss Posts

Emma Lembke did not know what an algorithm was when she started using social media.

The then-12-year-old was thrilled when her parents gave her permission to join Instagram. She quickly followed all kinds of accounts — from Kim Kardashian to Olive Garden, she said — and was soon spending five to six hours a day on the app. Then one day she searched for “ab workouts,” and her feed shifted. She started seeing 200-calorie recipes, pro-anorexia posts and exercise routines that “no 12-year-old should be doing in their bedroom,” she said.