Yea, I remember hearing about how they can actually add iron to your diet (which seems silly, but maybe), and how Teflon is shitty for you. I'm not really sure how much I buy into all that. I really just don't know enough to have an opinion in either direction about it. But I do know that they are great for working on those biceps! :)
RE: Pro tip: Season cast iron pans on a day you can open the windows!