A new study finds teen cannabis use may be linked to a doubled risk of serious mental illness, including psychosis and ...

The findings showed that teens who reported using cannabis in the past year were much more likely to develop psychiatric disorders later. In particular, the risk of psychotic disorders and bipolar ...

A new large-scale study has found that teens using cannabis have a higher risk of developing psychiatric disorders.

The largest fMRI study to date finds that heavy cannabis use in young adults reduces brain activity and impairs working memory performance.

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.

It’s not in your stomach; it’s in your head. Scientists have mapped exactly how cannabis overrides your brain's satiety ...