Oh, it isn't stress. Not emotionally, anyway. I've seen people be fine with a radical change of diet for a day or two, then thier body seems to go on strike. I've seen it happen with MREs, and with college food. It's like your body doesn't want to digest, just pass it along- I'll leave the details to your imagination.
And I apologize to anyone with a very active and pictoral imagination. I have one of those myself. *ugh*
_________________________
-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.