Dr. Natasha Campbell-McBride and Donna Gates did a series of videos which are very interesting.  I find some of the Body Ecology diet (Donna Gates) principles pretty convincing from a traditional foods standpoint.  This doctor is from overseas and she has some interesting ideas as well, though I do not fully understand  all of the diet concepts, except the gluten, casein free aspect.   Diet is a fascinating topic to delve into in any rate.  I don't mean "lose weight" diets - I mean diet from an "study of humans and animals -- how diet affects every aspect of our lives" viewpoint.

http://gapsdiet.com/Resources.html