Researchers followed more than 400,000 teens until they were adults. It found that those who used marijuana were more likely to develop serious mental illness, as well as depression and anxiety.

A new report warns that AI poses a serious threat to children's cognitive development and emotional well-being.

Some teen boys are determined to grow more muscular to match their social media idols. Going to the gym and manipulating their diet can become compulsive — and dangerous.

Young teens who use cannabis are more likely to be frequent users than people who start later, according to a study in JAMA Network Open. They are also more likely to seek care for health problems.

Teenage boys, especially, are getting lots of messages — from peers and from social media — about the power of protein supplements. Doctors caution there can be too much of a good thing.

A new report from the group Common Sense Media shows teens are experimenting with AI "companions" designed to provide deep conversations and advice.

With teens, it doesn't help to just say no to screen time. Instead, experts suggest teaching them to be smarter viewers of content, and learn to recognize how influencers and algorithms can manipulate them.

Teens spend much of their days on their phones — many of them during school. Here's how schools and teachers are trying to fix that.

Groups that connect elders and teens — both in real life and online — have a new sense of urgency in the loneliness epidemic.

The social media app unveiled a new product for young users of the app that is intended to make the service safer for teenagers. The tools include making all teen accounts private and allowing parents to supervise activity.

A new poll finds Gen Z teens are optimistic about the future but feeling less engaged at school.

Reasearch shows teens don't get sleepy until 10:45 or 11 p.m. But high school classes in Nashville still start at 7:05 a.m. "It's not a badge of honor," says the mayor.

The Poet Life aims to stop kids from smoking, vaping and doing hookah, by using the art of slam poetry.

New research found teens and young adults who even briefly cut time on social media gained self esteem. Try these 5 tips to help them — and yourself — improve screen-life balance.

The advent of vaping revived nicotine addiction among young people after a dramatic decline. The FDA seems poised to at last yank some products aimed at teens from the market. Will it work?