Linking cannabis and suicide doesn't prove causation

Echoing the research findings, the articles declared that if teenagers smoke cannabis daily, it makes them seven times more likely to commit suicide compared with non-users. Indeed, "there is no safe level of use", most reported.

"The authors should not have drawn these erroneous policy implications from this research," says Alex Wodak from St Vincent's hospital in Sydney, Australia. He points out that in Australia, 92 per cent of people say it is easy to buy cannabis, replicating similar findings elsewhere.