Fermentation & Plant Polysaccharides / Plant Glycans

Complex carbohydrates / Complex polysaccharides can be fermented by gut microbiota to produce metabolites, such as SCFAs
Jin et al. 2021b Front. Pharmacol. 12: 732541

The extraction of energy from otherwise indigestible common polysaccharides occurs because microbiota components can adaptively deploy an extensive array of Glycoside hydrolases (GHs) / Alfa-glucosidases and Polysaccharide lyases (PLs) that we humans do not encode in our genome
Xu et al. 2003 Science 299: 2074
Sonnenburg et al. 2005 Science 307: 1955

Microbial Fermenting / Fermentation of dietary polysaccharides to monosaccharides and short-chain fatty acids in the distal gut and their subsequent absorption stimulate de novo synthesis of triglycerides in the liver.
Ley et al. 2005

The energy generated leads to a marked expansion of bacterial populations and subsequent bulking of the colonic contents
James et al. 2003 Intern Med J 33(7):291-296

The increased metabolic and proliferative activity leads to increased utilization of potentially toxic thiocompounds and nitrogenous substances, such as phenols and ammonia, within the lumen
James et al. 2003 Intern Med J 33(7):291-296

Gas (hydrogen + Carbon Dioxide (CO2), heat, and SCFAs are the main byproducts of bacterial Fermenting / Fermentation of indigestible carbohydrates in the gut
James et al. 2003 Intern Med J 33(7):291-296

The end products of colonic fermentation are short chain fatty acids (SCFA), carbon dioxide and hydrogen
James et al. 2003 Intern Med J 33(7):291-296

see also:
Dietary fibers (DF) & Fermenting / Fermentation
Resistant starch type 2 (RST2)