Patton’s team followed over 1600 Australian school pupils aged 14 to 15 for seven years. Daily cannabis use was associated with a five-fold increased risk of depression at the age of 20. Weekly use was linked to a two-fold increase. The regular users were no more likely to have suffered from depression or anxiety at the start of the study.
Now why does cannabis have this affect in teens? Also, what does it do to adults, ones whose brains are not already going through massive hormonal changes that teen brains recieve.