Composition d'oligosaccharide-galactooligosaccharide du lait pour formulation pour nourrissons contenant la fraction soluble d'oligosaccharide présente dans le lait, et disposant d'un niveau faible de monosaccharides et procédé permettant de réduire la composition
The invention discloses an oligosaccharide mixture derived from cow's milk that can be easily spray dried comprising (a) a soluble oligosaccharide population which is the same as that of soluble oligosaccharides found in cow's milk and (b) β-galactooligosaccharides formed by the action of β-galacotsidase on lactose and the milk oligosaccharides. The mixture having a total monosaccharide content of less than 5% w/v and a lactose:oligosaccharide ratio of less than 20. A process for obtaining such a mixture, which includes a nanofiltration step, is disclosed. Nutritional compositions, especially infant formula, comprising said oligosaccharide mixture are also disclosed.