I work with health data, not a doctor, but the pattern is clear. Those fluffy white breads, or any breads with added sugars, seem to really upset people's guts. We were stumped by users' ongoing discomfort until our data kept pointing to refined carbs. When people switch to actual whole-grain breads, their complaints just drop off. It's just what the numbers show.
Honestly, I used to grab any white bread during my travel days in Shenzhen because it was quick and cheap, but I learned fast how bloated it made me feel. The worst types are the ultra-processed ones—white sandwich loaves and sweet buns loaded with refined flour and added sugar. They spike your blood sugar and mess with digestion, especially when eaten daily. Some multigrain breads look healthy but use coloring and flavoring instead of real grains, which does the same harm. I switched to sourdough and sprouted grain bread; both digest smoother and cause less inflammation. The change wasn't huge, but my energy stayed steady and no more stomach flare-ups even during long sourcing days at SourcingXpro.