Table 2 presents the contents of AIS and WIS in the raw and defatted passion fruit seed. Both of these FRFs were determined on a weight basis and were not corrected for protein and ash. For the raw seed, the contents
of AIS and WIS were 70.5 and 67.2 g/100 g,respectively. The slightly higher level of AIS relative to WIS was due to the alcohol precipitating substances such as protein and some inorganic substances. In some other fruit byproducts, such as mango,quince and citrus wastes, AIS contents were reported to be 30.7–49.7, 27.8–37.5 and 45.0–75.0 g/100 g, respectively. After lipid removal, the amounts of AIS and WIS in the defatted seed were largely increased to 89.0 and 93.3 g/100 g, respectively, hence the contents of insoluble FRFs were high enough to be a potential fibre source.