Insoluble dietary fibre was the predominant fibre fraction (98.8% of TDF). In the pomace and agricultural byproducts of many other fruits and vegetables, insoluble fibres were also reported to be the major fibre fraction. Since the consumption of insoluble fibres is beneficial to intestinal peristalsis by increasing fecal bulk and decreasing transit time, the defatted passion fruit seed could be a good source of insoluble fibre with desirable physiological effects.