I have posted before about my son's depression and how he thinks marijuana helps it. His reason might be true sometimes but I think he just wants to smoke it, especially since he told my husband he hadn't had depression for a while. However, yesterday when I told him I had read three different places in a book that it causes the depression and two of them were quoting studies, (we have talked about this before) and told him it was a temporary mood elevator. He actually agreed and said it is a mood elevator and only temporary but still says it doesn't cause the depression. This may seem like something small, but to me it is huge because he finally admitted something that is against his previous statements of marijuana being "so wonderful".