insoluble FRFs showed significant effects in absorbing glucose and retarding amylase activity, it is speculated that these FRFs might have potential benefit for controlling postprandial serum glucose, and potential applications as low calorie bulk ingredients for fibre enrichment and dietetic snacks. Since this fibre-rich passion fruit seed is available in large quantity as a byproduct of juice production, it could be exploited as a good source of food fibre. Further investigations of the physiological functions of these insoluble FRFs, using animal feeding experiments,
are underway.