The documentary uncovers what the industrial food system has done and is doing to our nation's farmers and to our nation's (collective) health. Various clips were run and she then interviewed Michael Pollan (author of the Omnivore's Dilemma and more recently Food Rules) who gave an overview of the changes over the past 50-60 years (nearly a complete monopoly over the meat in this country, production practices, huge amounts of antiobiotic use in animals, etc.). One of Michael Pollan's food rules is "If your great-grandmother wouldn't recognize this as food, don't eat it. (slight paraphrase)"
Oprah also interviewed Alicia Silverstone, who went vegan and improved her health (that would not work for me cause I LOVE MEAT!), but she did advocate eating more whole foods and produce. So that part I can agree with.
The final segment she interviewed Steve Ells, founder of Chipotle Grill. While I was not able to watch the entire third segment, I did gather that he sources as much sustainably raised food as possible and more of the dollars spent, go back to the farmer/producer.
As Oprah said, you need to see this and make your own decision. I urge everyone to see this movie. Buy it, rent it, go to the theatre! We need to make conscious decisions about the food we put in our bodies. If you have seen this documentary, please share your thoughts and ask those in your sphere of influence to watch this movie and make their own decisions.