I’ve already mentioned sugar addiction here.
I just learned of this film; haven’t vetted it. Sounds pretty one-sided, but still, there’s truth…
Update, May 2015: I have now seen it. And it is polemic. Very “let’s make more laws to control peoples lives!” But the info about how the crazy increase in sugar consumption, what that does to our bodies, why not all calories are equal, and how much misinformation we’ve been fed is all spot-on. And I’m inclined to agree that marketing junk food to young kids should curtailed, somehow.