A new study of more than 160,000 teens finds that even occasional cannabis use among 8th, 10th and 12th graders is tied to worse outcomes at school and more emotional distress. Teens who use cannabis ...

Using marijuana just once or twice a month was associated with worse school performance and emotional distress for teens, according to a large national study of adolescents led by Ryan Sultán, an ...

Teen cannabis use is linked to slower cognitive growth, especially memory, with THC as a likely contributor during key ...

Adolescents who will eventually experiment with marijuana score higher on behaviors of intelligence. Teens who were exposed ...

Many young people have the impression that marijuana is a safe and natural drug, but a new study links early use to an increased likelihood of serious mental health problems. (Justin Sullivan | Getty ...

Substance use among 16-year-olds in France has fallen sharply over the past decade, according to findings from the 2024 European School Survey Project on Alcohol and Other Drugs (ESPAD). The data ...

It’s 4/20 - but U.S. teens should avoid cannabis unless they want to stunt their brain development, according to a new study from California researchers. Teenagers who use cannabis in any way have a ...

Teens who use cannabis are more likely to perform poorly at school. They're also more likely to have mental health symptoms of anxiety and depression. Those are the findings of a new study in the ...