I've gotten sick from every grain I tried - wheat, barley, rye, oats, millet, corn, rice, lemongrass. Also apples and citrus. After I completely eliminated corn from my diet, I found I ALSO get sick from all legumes, chocolate, buckwheat, strawberries, fish, shellfish, the onion family (garlic, onions), potatoes (so I avoid nightshades, except for cape gooseberries), stone fruits (cherries, apricots, peaches), eggwhites, green tea, stevia, unfiltered honey, poultry, flaxseed, pork, cauliflower, broccoli, cabbage, carrots and parsnips, guava, tree nuts, marijuana (hempseed), cranberries, beef, cardamom, sunflower, pepper, as in salt and pepper; turmeric, xylitol and D-mannose made from birch/beech trees, elderberries, dates, ginkgo biloba, yerba mate', acorn, poppy seeds, avocado, blackberries and raspberries, banana, cucumber and melons related to it.

So far. I haven't tried many foods I probably would react to, because it makes me sick for days.