Xylooligosaccharides mediated gut microbiome modulation: prebiotics to postbiotics

An increasing trend toward harnessing nutraceuticals as food supplements rather than pharmaceuticals as curative and preventive agents against various ailments has been observed. Owing to their health benefits, prebiotics have received notable attention from the pharmaceutical and food industries. Among the different prebiotic oligosaccharides, xylooligosaccharides (XOS) exhibited a remarkable capacity to stimulate the growth of the gut microbiota and benefit individuals with metabolic abnormalities. Additionally, XOS can be produced from various renewable agricultural wastes, which supports their economic feasibility for use as prebiotics at the industrial level. This review explains gut microbiome modulation based on in vivo, in vitro, and clinical findings. Gut microbiome modulation leads to the production of postbiotics that stimulate various beneficial health effects. The current review entails the mechanisms of different health-promoting activities mediated by XOS, including immunomodulation and anticancer effects. Additionally, the concept of converting prebiotics to synbiotics using XOS has been established for nutraceutical applications. Synbiotics based on XOS and probiotics may be good alternatives to nutraceuticals for improving human health.