Frequent use of cannabis may contribute to the onset of depression.

This study explored the relationship between the consumption of cannabis (marijuana) and the occurrence of depression by means of a meta-analysis. A total of 14 scientific publications were considered eligible for this meta-analysis. 

Researchers found out that users of marijuana were 1.17 times more likely to suffer from depression than non-users of this psychoactive drug. The findings of this study reveal that cannabis consumption may edge an individual closer to depression.