What physical structure of whole corn can irritate an already inflamed digestive tract as a physical irritant?

Tough, indigestible cellulose hull

Beyond chemical interactions like fermentation or allergic reactions, the physical makeup of whole corn kernels can contribute to digestive stress, especially for those with existing inflammation, such as Irritable Bowel Syndrome (IBS). The kernel is encased in a tough, indigestible cellulose hull. This hull functions essentially as roughage, which, while generally beneficial for motility, can physically agitate or irritate a sensitive or inflamed digestive lining. This mechanical irritation compounds potential issues arising from the fermentation of resistant starches within the corn. In contrast, refined corn products often have this hull removed, shifting the potential digestive challenge toward the remaining starch or sugar components.