“You might notice things like blueberries, seeds, nuts, popcorn hulls or vegetable skins like tomatoes or peppers in your stool,” Kais said. “These foods again have tough outer layers that are resistant to our human digestion, especially if not fully chewed.”
Article source: https://www.huffingtonpost.co.uk/entry/why-whole-corn-poo_uk_69fa0a01e4b055e1a496fd2f