>Stop eating gluten for two weeks, or preferably three. If you feel better after that, then you may be on the right track, but wait, it might be placebo. To be

>Stop eating gluten for two weeks, or preferably three. If you feel better after that, then you may be on the right track, but wait, it might be placebo. To be really sure, have yourself a big ol' bowl of pasta or pizza. In about 5-7 hours or so, if you're suffering from Celiac... you'll know. This. A friend of mine is a celiac and didn't know throughout high school; she and her family simply thought she had a very weak immune system since she was sick so often. (In fact, she often ate crackers to calm her upset stomach, which obviously exacerbated the problem.) To clarify, though, the big bowl of pasta comes after the three weeks of "no gluten." If you're suffering from Celiac disease, as jerf said, once you take in a large amount of gluten after going gluten free for three weeks, you will notice. It will be like night and day. If you feel fine after that pasta, you're not a Celiac. I'm not a doctor, but this is a pretty clear cut test.