It is insane how the words natural and health are so unrelated in the food industry. I recently watched a movie called "Food Inc." that was about the food industry. Some of the investigations done by the film were disturbing. It shows the inner workings of the different segments of the food industry, and the common practices that no one knows about. The film also discussed the types of regulations governing the food industry (like those surrounding organics, natural foods, and genetically modified organisms).
I would say the film is a must watch for anyone who shops in a grocery store and is concerned with his or her health.