Over the years, a host of previous research has pointed to a link between the popular recreational drug and mental health conditions. Lead author Ian Hamilton, a lecturer in mental health, said the greatest danger cannabis users face is by combining the drug with tobacco. Mr Hamilton told The Independent: 'The link between cannabis and psychosis has been investigated by researchers since the drug became popular in the 1960s. High potency cannabis contains less of cannabidiol (CBD), which is believed to protect against negative side-effects, such as psychosis. A study analysed nearly 39,000 samples of cannabis seized by the US Drug Enforcement Administration between 1995 and 2014.

Source: New Zealand Herald April 22, 2017 03:56 UTC