My husband and I have been eating 80/20 Primal for a couple of years. We both have noticed that when we eat "cheat" foods or eat a lot of carbs, we tend to feel sick or jittery in a way that never occurred before. For example, pizza never used to bother me, but now if I have more than a very small amount I get indigestion. From what I have read around the web, this seems fairly common. This doesn't bother me very much; I usually make a conscious choice to eat something bad (usually in a social situation) and realize I may not feel great later. It's usually not worth it, and serves as a reminder that these foods are not good for me. My husband, on the other hand, is really irked by the fact that he can no longer eat certain foods without paying for it later.
On to my question: I am on Day 6 of a Whole30, so will be eating super-clean for a month. By abstaining from foods that I normally eat regularly or occasionally, am I risking developing an intolerance to those foods? I'm especially wondering about dairy; I come from good Scandinavian stock, love dairy, and tolerate it very well.
Please don't tell me I shouldn't be eating non-Paleo foods anyway, so i shouldn't worry about creating an intolerance. I want to be able to off-road now and then, and I believe that (barring celiac or other medical problems) it's healthier emotionally to leave options open and be able to indulge myself once in a while.