If great grandma woudln't recognize it as food don't eat it

Michael Pollan's In Defense of Food: An Eater's Manifesto is an exposé on how the U.S. food supply no longer consists of food, and is mostly manufactured chemicals.

The good news is Pollan goes on to talk about how we can get back to eating real food. His basic premise is: if your great grandmother wouldn't recognize it as food, don't eat it.