Cannabis catastrophic for young brains
The adolescent brain is particularly vulnerable to the effects of cannabis, Australian and New Zealand research shows.
Teenagers who regularly use the drug are more likely than non-users to underachieve academically, suffer significant mental health problems and use illicit drugs in later life.
And the more they use the greater the adverse effects on their health.
The Lancet study of several thousand adolescents shows that those who smoke cannabis daily are