This disclosure relates to enhancing growth and/or activity of lactobacilli using a prebiotic formulation which includes iso-malto oligosaccharides and α-galactosidase and to enhancing growth and/or activity of bifidobacteria using a prebiotic formulation which includes iso-malto oligosaccharides and β-glucanase. Other combinations of fibers and enzymes are described below which also stimulate growth and activity of lactobacilli or bifidobacteria. These combinations of enzymes and prebiotics can be taken separately or added to foods, including desserts.
