Cannabis sativa, from The Vienna Dioscurides, 512 AD

We discuss why it's so hard to answer what seems like a very simple question on the minds of many people: is weed bad for me?  This is just part one, where we make the limitations of this research as clear as possible.  Next time, we'll dive into what we do know to try and come to a conclusion.

Literature cited:

See references used in part 2.