Inulin, not to be confused with insulin, is an indigestible polysaccharide that is found in many plant species, where it serves as an energy storage molecule. The polymer is made up of mostly fructose units, joined primarily by β(2,1) linkages, with glucose as terminal residues. This structure renders inulin indigestible for humans, and as a result, inulin has found use as both a dietary fiber and, as it is freely filtered at the glomerulus, an indicator of renal function. Inulin is typically found in high amounts in foods such as artichoke and jicama, and is also obtained from chicory root, from which the dietary supplement is frequently isolated. As a dietary supplement, inulin is essential for maintaining intestinal health, and is o