Fructans, otherwise known as fructooligosaccharides, are important as storage components in many plant species, including several Asteraceae, Liliaceae and Poaceae, which are of great importance as forage grass cereals. The most common sources are underground organs of chicory, Jerusalem artichoke, asparagus, and members of the onion family (Wack & Blaschek, 2006). They contain (2→1)- and/or (2→6)-linked β-d-fructofuranosyl units with one internal or external glucosyl unit (Waterhouse & Chatterton, 1993). Some non-digestible fructans, namely those containing (2→1)-linkages, such as inulin and inulin-like oligosaccharides (Fig. 1), confer potentially interesting prebiotic properties in human and pet foods, and non-food applications (Fuchs, 1991).