US states sue TikTok, claiming its addictive features harm youth mental health

Lawsuits allege platform's dopamine-inducing' algorithm can lead to anxiety, depression and body dysmorphia

More than a dozen states and the District of Columbia filed lawsuits against TikTok on Tuesday, alleging the popular short-form video app is damaging children's mental health with a product designed to be used compulsively and excessively.

The lawsuits stem from a national investigation into TikTok, which was launched in March 2022 by a bipartisan coalition of attorneys general from several states, including California, Kentucky and New Jersey. All of the complaints were filed in state courts and claim that TikTok's algorithm is especially dangerous given the platform's widespread use among young people and its ability to deliver quick hits of dopamine. Design choices such as infinite scrolling, push notifications and in-app purchases prey on youth and create addictive habits among users, prosecutors allege. There are over 170m monthly active TikTok users in the US, and over a billion worldwide.