If you eat you should check out the following:
The Beautiful Truth (click through to view the full documentary online)
Food, Inc (click through to view the full documentary online)
I won’t link to the available torrents here, because New Zealand has a draconian, ridiculous government that may hassle my ISP.
However, all of these documentaries are fully torrentable if you can’t access/don’t want the DVDs, or have seen the light and just prefer to download everything.