I have a poor response to beans too. They are high in sugars, thus feed yeast, or maybe I just have an undiagnosed sensitivity to them. I too would like to know why soy is forbidden!
Meanwhile, here's a list of foods that contribute to the gas pains of inflammation-response:
Foods That Contribute to Gas Production Legumes Most beans, especially dried beans and peas, baked beans, soy beans, lima beans
Milk & milk products Milk; ice cream; and cheese
Vegetables Cabbage; radishes; onions; broccoli; Brussels sprouts; cauliflower; cucumbers; sauerkraut; kohlrabi; asparagus
Root vegetables Potatoes; rutabaga; turnips
Fruits Prunes; apricots; apples; raisins; bananas
Cereals, breads All foods thst contain wheat and wheat products including cereals, breads, and pastries. Check labels.
Fatty foods Pan-fried or deep-fried foods; fatty meats; rich cream sauces and gravies; pastries. (While fatty foods are not carbohydrates, they too can contribute to intestinal gas.)
Liquids Carbonated beverages, medications, or powders