Kiryakitty is right--fat might be the culprit in your diet. When my symptoms first started, I also thought I couldn't eat protein and so lost a lot of weight and became very weak. Later, I found out I could tolerate egg white and boiled sole (it's very soft and non-irritating). If your stomach can handle some tougher stuff, you might also want to give skinless, boiled chicken breasts or water-packed tuna a try.