Regardless of the lack of studies, think about this. It's a proven fact that since the beginning of recorded history, all the way up to the agricultural revolution, there were virtually no diseases other than those caused by infections and cross contamination of food/wounds. Keep in mind I say virtually. Before the agricultural revolution, things like diabetes didnt exist. It took us from a diet that mainly consisted of nutrient dense fruits and veggies, and tons and tons of muscle building proteins; to a diet that was mainly supplemented by unlimited access to carbohydrates. That when put side by side with fruits/veggies/meats are incredibly lacking in nutrients. You can check that here if you dont believe me, http://nutritiondata.self.com/ There is literally nothing in grains and dairy that you cannot get from fruits, veggies, and meat.
If you're at all curious about any of this and dont want to take information from a party that stands to make money, take a look at this article written in 1987 by Jared Diamond (http://en.wikipedia.org/wiki/Jared_Diamond) http://www.ditext.com/diamond/mistake.html
If you're at all curious about any of this and dont want to take information from a party that stands to make money, take a look at this article written in 1987 by Jared Diamond (http://en.wikipedia.org/wiki/Jared_Diamond) http://www.ditext.com/diamond/mistake.html