Can TikTok help young people take a break from screens?

On Thursday, TikTok announced a new option: a nightly in-app guided meditation exercise that is turned on by default for users younger than 18.

At 10 p.m., their For You Page is overtaken by a blue screen and relaxing music, and the user is guided to “inhale,” “hold” and “exhale.”

“The idea being that after that meditation is over, you put down your phone,” said Dr. Willough Jenkins, a child psychiatrist who shares…