Hi, my name is Marsha, and I've had my ileostomy for nearly 60 years... Much like what others have said, the sesame seeds on a bun or bagel have never been an issue, but like all things, digestion can change over time... I've always been able to eat most fiber, like nuts, corn... salads, but have avoided raw celery, carrots, and cabbage.... The first year I had an ileostomy, I was baking a Jewish pastry (hamantashen) for a holiday... (Purim) One of the fillings we used was "poppy seeds".. Hadn't had a problem with a poppy seed bagel, (which is just a handful), the the spoonful, in the pastry did cause a problem.. (severe pain, cramps..) I lived in Brooklyn, and my Dr. was in NYC, and wanted me to come in, not go to the hospital. So my mother and I took the train into the city.. The doctor wanted me to remove the pouch, and he then pressed around on my belly.... Along with a lot of gas, "guess what" came shooting out of my stoma like "pellets".... You guessed... Lot's and lots of poppy seeds, everywhere!!! What a mess... No more poppy seeds for me... Once at an ostomy conference in NYC, they served coconut ice cream for dessert.... Hmmm, not a good idea.. That night, the hotel dr. had a lot of calls. So many people had blockages from the coconut. I've never had coconut since then.... Best advice.....try small amounts of a questionable food, chew well, and drink plenty of fluids.... Marsha