Here is a warning regarding temporary, but complete diet change. After Eating paleo-only for 2 months, I went camping. Whenever I camp I eat the worst food (nutritionally), and smoke cigars- all the stuff I dont allow myself to do. The day I got there I had "dirty rice" (rice with ground sausage-high rice content) Soft drinks, Danishes, and Numerous Reeses peanut butter cups. The second evening I threw up. I consulted my dad about it (he's a doctor) he thought that it definitely was the sudden change in diet that did it. I never was 'sick' my stomach had had enough, and wass finally rejecting bad food. The moral to this story is, if you dont want to vomit, don't do what i did- and learn the hard way.
Ry