The invention relates to synergistic compositions comprising prebiotic components selected from fructose polymers GFn and Fm, either containing a glucose (G) end-group, or without a glucose end-group, and one or more component of a group of prebiotics consisting of modified or unmodified starch and partial hydrolysates thereof, partially hydrolysed inulin, natural oligofractoses, fructo-oligosaccharides (FOS), lactulose, galactomannan and suitable partial hydrolysates thereof, indigestible polydextrose, acemannan, various gums, indigestible dextrin and partial hydrolysates thereof, trans-galacto-oligosaccharides (GOS), xylo-oligosaccharides (XOS), beta-glucan and partial hydrolysates thereof, together if desired with phytosterol/phytostanol components and their suitable esters, and if desired other plant extracts, mineral components, vitamins and additives.