In general, it is known that the functionality of fructooligosaccharides helps the proliferation of beneficial bacteria in the intestine. This is correct in general terms, but the actual operation is a bit more complicated. Ingested fructooligosaccharides are fermented by intestinal bacteria in the large intestine, and short-chain fatty acids (SCFA) produced as a result of fermentation acidify the intestinal environment and create a favorable environment for beneficial bacteria to thrive.
In addition to improving the intestinal environment, short-chain fatty acids, which are the end products of fructooligosaccharide fermentation, act as substrates or signaling molecules in various metabolic reactions, such as immune responses, glucose homeostasis, and lipid metabolism regulation.
In 2016, a meta-study was reported that comprehensively reviewed the various benefits of fructooligosaccharide intake .