Oligosaccharide mixture

1. An oligosaccharide mixture comprising:

5-70 wt % of at least one N-acetylated oligosaccharide selected from the group consisting of GalN Acα1,3Galβ1,4Glc, Galβ1,6GalN Acα1,3Galβ1,4Glc and combinations thereof;

20-90 wt % of at least one neutral oligosaccharide selected from the group consisting of Galβ1,6Gal, Galβ1,6Galβ1,4Glc Galβ1,6Galβ1,6Glc, Galβ1,3Galβ1,3Glc, Galβ1,3Galβ1,4Glc, Galβ1,6Galβ1,6Galβ1,4Glc; Galβ1,6Galβ1,3Galβ1,4Glc Galβ1,3Galβ1,6Galβ1,4Glc, Galβ1,3Galβ1,3Galβ1,4Glc and combinations thereof; and

5-50 wt % of at least one sialylated oligosaccharide selected from the group consisting of NeuAcα2,3Galβ1,4Glc, NeuAcα2,6Galβ1,4Glc and combinations thereof.

2. The oligosaccharide mixture as claimed in claim 1 comprising 10-70 wt % of the N-acetylated oligosaccharides, 20-80 wt % of the neutral oligosaccharides and 10-50 wt % of the sialylated oligosaccharides.

3. The oligosaccharide mixture as claimed in claim 1 comprising 15-40 wt % of the N-acetylated oligosaccharides, 40-60 wt % of the neutral oligosaccharides and 15-30 wt % of the sialylated oligosaccharides.

4. The oligosaccharide mixture as claimed in claim 1 comprising 30 wt % of the N-acetylated oligosaccharides, 50 wt % of the neutral oligosaccharides and 20 wt % of the sialylated oligosaccharides.

5. The oligosaccharide mixture as claimed in claim 1 which comprises 5-20 wt % of the N-acetylated oligosaccharides, 60-90 wt % of the neutral oligosaccharides and 5-30 wt % of the sialylated oligosaccharides.

6. The oligosaccharide mixture as claimed in claim 1 which is derived from animal milk.

7. The oligosaccharide mixture as claimed in claim 6 which is derived from an animal milk selected from the group consisting of cows' milk, goats' milk and buffalo milk.

8. The oligosaccharide mixture as claimed in claim 1 which is made synthetically.

9. A food product comprising an oligosaccharide mixture comprising:

5-70 wt % of at least one N-acetylated oligosaccharide selected from the group consisting of GalN Acα1,3Galβ1,4Glc, Galβ1,6GalN Acα1,3Galβ1,4Glc and combinations thereof;

20-90 wt % of at least one neutral oligosaccharide selected from the group consisting of Galβ1,6Gal, Galβ1,6Galβ1,4Glc Galβ1,6Galβ1,6Glc, Galβ1,3Gal1,3Glc, Galβ1,3Galβ1,4Glc, Galβ1,6Galβ1,6Galβ1,4Glc, Galβ1,6Gal1,3Galβ1,4Glc Galβ1,3Galβ1,6Gal1,4Glc, Galβ1,3Galβ1,3Galβ1,4Glc and combinations thereof; and

5-50 wt % of at least one sialylated oligosaccharide selected from the group consisting of NeuAcα2,3Galβ1,4Glc, NeuAcα2,6Galβ1,4Glc and combinations thereof.

10. The food product as claimed in claim 9 which is an infant formula.

11. The food product as claimed in claim 9 which comprises from 0.3 to 4% by weight based on dry matter of the oligosaccharide mixture.

12. The food product as claimed in claim 9 comprising 10-70 wt % of the N-acetylated oligosaccharides, 20-80 wt % of the neutral oligosaccharides and 10-50 wt % of the sialylated oligosaccharides.

13. The food product as claimed in claim 9 comprising 15-40 wt % of the N-acetylated oligosaccharides, 40-60 wt % of the neutral oligosaccharides and 15-30 wt % of the sialylated oligosaccharides.

14. The food product as claimed in claim 9 comprising 30 wt % of the N-acetylated oligosaccharides, 50 wt % of the neutral oligosaccharides and 20 wt % of the sialylated oligosaccharides.

15. The food product as claimed in claim 9 which comprises 5-20 wt % of the N-acetylated oligosaccharides, 60-90 wt % of the neutral oligosaccharides and 5-30 wt % of the sialylated oligosaccharides.

16. The food product as claimed in claim 9 which is derived from animal milk.