Dietary fiber (DF) is defined as lignin and the polysaccharide components of plants which are indigestible by enzymes in human gastrointestinal tract. Increased intake of DF has been strongly recommended because of their effects in decreasing the risk of diabetes, colon cancer, obesity and cardiovascular illnesses in human. Functional foods can be defined as foods that are used to prevent and treat certain disorders and illnesses, in addition to their nutritional value by itself. Dietary fiber is one of the components (amino acids, peptides and proteins, vitamins and minerals, antioxidants, oligosaccharides, sugars/alcohols, glucosides, etc.) that have been identified as having potentially useful functional effects for human health. Process...