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.