2015

"Neuroscientists from the University of Buffalo’s Research Institute on Addictions found that endocannabinoids — chemical compounds in the brain that activate the same receptors as THC, an active compound in marijuana — may be helpful in treating depression that results from chronic stress."

2016

"New research published today in the journal JAMA Psychiatry found that using marijuana as an adult is not associated with a variety of mood and anxiety disorders, including depression and bipolar disorder."

Young, you can believe whatever you want to until the monkey flies out...