Fructan polymer

Fructan polymers are a class of carbohydrates composed of fructose units, typically linked to a sucrose molecule, and are found extensively in plants such as wheat, onions, and chicory (PubMed: 27657317). They are categorized based on their linkage types into inulin (beta-2,1), levan (beta-2,6), and branched graminan types. In humans, these polymers are not broken down by endogenous digestive enzymes but serve as vital prebiotics, selectively fermented by beneficial gut bacteria like Bifidobacterium to produce short-chain fatty acids (SCFAs) such as butyrate (NIH: PMC6041804). While they promote gut health and metabolic function, fructans are also significant components of the FODMAP group, which can cause gastrointestinal symptoms in individuals with Irritable Bowel Syndrome (IBS) due to their osmotic effects and rapid fermentation (StatPearls: NBK562224). Beyond nutrition, specific fructans like delta-inulin are utilized as potent vaccine adjuvants (e.g., Advax) due to their ability to modulate the innate immune system via pathways involving Toll-like receptors (PubMed: 25410551). Consequently, while not a traditional therapeutic target like a protein receptor, fructan polymers are critical molecules in dietary management, immunology, and drug delivery systems.

Other names

InulinLevanFructooligosaccharideFOSGraminanPhleinPolyfructose

Fructan polymers act as prebiotics by undergoing selective fermentation by gut microbiota to produce short-chain fatty acids (SCFAs), and they exert osmotic pressure in the intestinal lumen; as adjuvants, they enhance immune responses by activating innate signaling pathways (PubMed: 25410551, StatPearls: NBK562224).