The present invention relates to a nutritional composition comprising at least one fucosylated oligosaccharide and at least one N-acetylated oligosaccharide for promoting or inducing a global gut microbiota that is closer to the one of infants fed exclusively with human breast milk, in comparison to infants fed with a conventional nutritional composition. The composition can be an infant formula and is in particular intended for infants between 0 and 12 months of age fed predominantly with infant formula. It promotes a healthy intestinal flora and has beneficial short and long terms effects.