I have the exact problem with any pringles and I’m fine with regular potato chips. Comparing the ingredients, it might be because pringles contains milk ingredients in all of them it looks like as well as wheat, where as a lot of potato chips don’t. So one of those could be the culprit for people who have stomach issues with them.
Food Safety Report: Pringles, Jackson, Tennessee, USA
I have the exact problem with any pringles and I’m fine with regular potato chips. Comparing the ingredients, it might be because pringles contains milk ingredients in all of them it looks like as well as wheat, where as a lot of potato chips don’t. So one of those could be the culprit for people who have stomach issues with them.