Actually, [i]anything[/i] is harmless in moderation. And, it is funny. After this "Legalize Marajuana" campaign with most people, EVERY study that showed that it kills disappeared. Anyone else notice this either? I don't want to hear from anyone who says "legalize it". They are the ones who most likely caused all of the reports of the study to disappear.
And, no, I am not educated in this. Neither are you. You have to be a biological engineer and find EVERY single effect of it, good and bad to know whether it is good or bad for you. Not just THC, all of it. EVERY single chemical in it.
It was once used to get rid of cancer because it slowed the multiplication of cells. It was then illegal because it slowed the multiplication of cells. So if you do use it, it kills your immune system, because it slows the T-Cell production and your body cant react quickly enough to infections. There is no study about that. It is plain reasoning. If it inhabits cells, and T-Cells are cells, the T-Cells are inhabited, and the immune system is slowed because of T-Cells that are inhabited. Logic and reasoning play a part in this too.