Composition with a viscosity between 1 and 6 mPa.s, a caloric density between 10 and 250 kcal per 100 ml, comprising brief Bifidobacterium, a non-digestible saccharide A and a non-digestible saccharide B, where: a. the non-digestible saccharide A has a degree of polymerization between 2 and 200 and at least 60 mol% of the total saccharide monosaccharide units A are selected from monosaccharides from the group consisting of galactose, fructose and glucose monosaccharides； and b. the non-digestible saccharide B has a degree of polymerization between 2 and 200 and at least 60 mol% of the total saccharide monosaccharide units B are selected from monosaccharides from the group consisting of galactose, fructose and glucose monosaccharides； and where i) the percentage of at least one monosaccharide selected from the group consisting of glucose, fructose and galactose in saccharide A is at least 40% mol greater than the percentage of the same monosaccharide in saccharide B； and / or ii) the percentage of at least one glycosidic bond of saccharide A based on total glycosidic bonds of saccharide A is at least 40% greater than the percentage of the same glycosidic bond in saccharide B； and / or iii) the degree of polymerization of saccharide A is at least 5 monosaccharide units less than the degree of polymerization of saccharide B.Composición con una viscosidad entre 1 y 6 mPa.s, una densidad calórica entre 10 y 250 kcal por 100 ml, comprendiendo Bifidobacterium breve, un sacárido no digerible A y un sacárido no digerible B, donde: a. el sacárido no digerible A tiene un grado de polimerización entre 2 y 200 y al menos 60 % mol de las unidades totales monosacáridas de sacárido A se seleccionan de monosacáridos del grupo consistente en galactosa, fructosa y monosacáridos de glucosa； y b. el sacárido no digerible B tiene un grado de polimerización entre 2 y 200 y al menos 60 % mol de las unidades totales monosacáridas de sacárido B se seleccionan de monosacáridos del grupo consi
