More use is linked to attention and behavior problems, but also less anxiety.
During crucial bone-building years of youth, physical activity is all-important.
Regardless of income and family makeup, kids do better in neighborhoods where trusted people are involved in their lives.
But teens who use social media daily posted lower test scores.
You may want to reconsider. Study highlights causes for concern.
A study of 1.5 million people found that fitter teens had lower lifetime risk.
Lower levels of hormone-disrupting chemicals seen in adolescents after trying products without potentially harmful ingredients.
A teen fights for her life against toxic shock syndrome, as her parents keep watch and a community rallies to support them.
Regulators also want those over 18 to sign papers stating they know the health risks before using sun lamps.
Aggressive or antisocial young people may have less gray matter in key regions.
Teens with close friends are more likely to be in good health by age 27.
Researchers are uncertain how teens are modifying the devices to get high.
