I personally think you can go too far looking into the evils of food. In the past I did an special diet to try and improve my health problems. It was incredible how every food you can imagine, be it natural or processed has bad press about it. It got to the point I didn't know what to eat, and got very thin, my blood results also showed much worse health.
My opinion is, have a bit of everything, except if your doctor has told you something else. You can always find evidence on google, I would always check the sources of the research too. Moderation is the key, and obviously trying to eat as much healthy food and drink as possible!