I also have a type of celiac disease, called microscopic colitis, and avoid gluten, which is hard, it is in so many things, one needs to read labels carefully. I also can't do most grains, even potatoes. There are a number of gluten free products out there--pancake mix, even brownie mix , although they often contain other grains, so important to read the label. I was a vegan for many years, but now can't eat soy or grains, so it is pretty much veggies, fruit and meats. Coincidentially, this is the kind of "hunter-gatherer" diet that the eat for your blood type folks recommend for my O blood type. I also found the whole premise of it pretty questionable, but this is how I do best eating. Generally, people with this need to be careful about many of the things in cycling supplements--bars, drinks. Sometimes I just decide to use them and take the consequences for a day or so.