Hi Marka!I avoid all of the mentioned foods you ate. Bread, tuna and french fries. They all give me problems. In many cases my problems occurrs twice - about 9 and 24 hours after I've been eating "bad" food. I wonder where the food is then in the digestive system.To be able to eat grains, I have to cook them a long time in much water, which I do frequently.If I happen to eat food that's bad for me, I eat an umeboshi plum and avoid water for two hours.