Total dietary fibre (TDF) insoluble dietary fibre (IDF), and soluble dietary fibre (SDF) content of the fibre concentrates and the ratio between IDF and SDF are presented in Table 2. With respect to dietary fibre content, the co-products obtained from those tropical exotic fruits used in this study showed (p < 0.05) TDF contents ranging from 69.1 to 81.5 g/100 g on a dry matter basis. The TDF in all samples analysed was similar to those reported for other tropical fruits, such as pomegranate peel co-product (72.7%, dry sample), in fibre from Mexican lime peels (70.4 g/100 g dry sample)or açai pulp (71.2% dry sample), and higher than those reported for some other fruits; for example, a fibre-rich cocoa product (60.5 g/100 g) or coconut fibre (60.9 g/100 g dry sample). In all cases, the IDF fraction was higher than the SDF fraction.Pineapple showed the highest (p < 0.05) IDF content, followed(p < 0.05) by guava, passion fruit and mango. This large amount of IDF present in exotic fruit co-products is an indicator of the considerable amounts of celluloses and hemicelluloses present. A high proportion of IDF in the exotic fruit co-products could be considered an advantage because IDF can be used by the food industry as an ingredient to increase the content of indigestible insoluble compounds . In addition, a high IDF content could have beneficial้ health effects related to increases in satiety and in the volume and
weight of faecal mass, thus promoting improved functioning of the digestive system.