What the pigs were eating

Jesus tells the story of a runaway who was hungry enough to eat the pods (or husks) that the pigs were eating. Imagine how that parable landed in a Jewish context! The term appearing in the Greek of Luke 15:16 is keration and may refer to the horn-shaped seed-pods of the carob tree (Ceratonia siliqua). I wonder what this kind of fiber would do to the human gut?