The invention discloses an oligosaccharide mixture comprising 5-70 wt% of at least one N-acetylated oligosaccharide, 5-90 wt% of at least one neutral oligosaccharide, 2-50 wt% of at least one sialylated oligosaccharide, and/or 5-70 wt% of at least one fucosylated oligosaccharide. The invention also discloses a food product, especially an infant formula, comprising said oligosaccharide mixture.