A study that appeared in the British Journal of Psychiatry found that teenagers who use marijuana are at an increased risk for full-blown mental illnesses later in life. This study, the largest of its kind to date, included information gathered from more than 6,000 teenagers.

"Dr. Juoko Miettunen, who led the research at the University of Oulu in Finland, said the findings were significant because they demonstrated a link with psychosis at a very early stage of cannabis use."

Some of the symptoms that indicated of risk of psychosis included feeling like something strange was happening, feelings of paranoia, and difficulty controlling speed of thought. Source: Medical News Today

Labels: marijuana, mental_health, research