Yes, I am allergic to gluten, or at least react badly to it, but I also react very badly to sugar. I know this. I've known it for many years now. *slaps hand* I'm not going to be too strict on many of the carbos (like brown rice and corn and, to a lesser degree, potatoes) after the first bit because I'll never be able to stay on the diet otherwise. Well, not and pay the bills. Meat is expensive! :P

But yes, allergies are a big part of it, however the allergies are as much a symptom as the cause.