Researchers examined the effect of Bimuno® Galactooligosaccharides (GOS) on the composition and activity of the colonic microbiota using short-term colonic incubations, observing effects on metabolite production, including increased SCFA production (increased the production of acetate, propionate, butyrate, and lactate while reducing production of ammonia and branch-chained fatty acids) resulting from the enrichment of beneficial bacteria.
Original paper: https://www.mdpi.com/2673-8007/3/1/8