Investigative journalist Eric Schlosser's articles and subsequent book "Fast Food Nation" exposed things about America's corporate-controlled food industry that were truly frightening.

Unfortunately, the movie adaptation of "Fast Food Nation" failed to convey most, if any, of those messages concisely or convincingly.

The documentary "Food, Inc." is the film "Fast Food" should have been. It's powerful, disturbing stuff.

However, you might not want to eat before you see it. Or afterward, for that matter. …

Among the experts director Robert Kenner interviewed for this film are Schlosser (who served as a co-producer) and Michael Pollan, a journalism professor and author of the book "An Omnivore's Dilemma."

Schlosser and the movie argue that a turning point in diminishing food-industry standards came when drive-in restaurants became drive-throughs.

At that point, restaurants turned into food "assembly lines," which stressed uniformity and speed — or quantity over quality.

But the film doesn't just target the food corporations and growers. According to the movie, legislators and governmental groups that are supposed to be responsible for food-industry reforms include former and current members of the corporations they're supposed to oversee.