It has been proven over and over again that "natural" foods are the way to go.

For years, 3rd world countries live healthier lives because they live off of the land. They are not "blessed" as we "think" we are to have access to all sorts of "fast foods" and fatty unhealthy foods. They are not dying from eating processed foods, however, as they become westernized, they are becoming more and more unhealthy as they pick up on western culture food habits.