You can read a lot on the internet and really have no idea what to believe. Especially the commercial with the french guy.
Anyway I found this article to be quite interesting and I follow these lessons. Since losing my weight I have done a lot of research and reading about nutrition and I knowing how my body reacts to things I'm a full believer of non processed foods and eating as fresh as possible.
http://www.popsci.com/node/74033/edit
Take a look for yourself.