#$%^&*AU2019261707A120191128.pdf#####ABSTRACT The invention proposes a nutritional composition comprising selected oligosaccharides that reduces the abundance of Streptococcus bacteria in the gut of infants or young mammals. The infants are preferably infants in needs presenting a relatively high count of Streptococcus. Ultimately the reduction of streptococcus and the related microbiota balance affects and lowers the risk of adiposity or obesity later in life.