1. Composition for promoting healthy bone growth, and / or prevention and / or therapy of bone diseases, preferably osteomalacia, rickets, osteopenia or osteoporosis, containing at least one long chain polyunsaturated fatty acid (LC-PUFA), at least one probiotic and a mixture of oligosaccharides, wherein said mixture contains at least one N-acetylated oligosaccharide, at least one sialylated oligosaccharide and at least one neutral oligosaccharide. 2. The composition of the preceding claim, wherein the neutral oligosaccharide is selected from fructooligosaccharides (FOS) and / or galactooligosaccharides (GOS), preferably GOS. 3. The composition of claim 1, wherein said oligosaccharide mixture contains at least one N-acetylated oligosaccharide selected from the group consisting of GalNAcα1,3Galβ1,4Glc (= 3′GalNAc-lac = N-acetylgalactosaminylactose), Galβ1,6GalNAcα1,3Galβ 4Glc (= 6′Gal-3GalNAc-lac = galactosyl-N-acetylgalactosaminillactose), Galβ1,4GlcNAcβ1,3Galβ1,4Glc (lacto-N-neotetraose or LNnT) and Galβ1,3GlcNAcβ1,3Galβ1,4 Lt tetra ), at least one sialylated oligosaccharide selected from the group consisting of NeuAcα2,3Galβ1,4Glc (= 3′-sialyllactose) and NeuAcα2,6Galβ1,4Glc (= 6′-sialyllactose), and at least one neut cial oligosaccharide selected from the group consisting of Galβ1,6Gal (= β1,6-digalaktozid)； Galβ1.6Galβ1.4Glc (= 6′Gal-lac)； Galβ1.6Galβ1.6Glc； Galβ1,3Galβ1,3Glc； Galβ1,3Galβ1,4Glc (= 3′Gal-lac)； Galβ1.6Galβ1.6Galβ1.4Glc (= 6 ′, 6-diGal-lac)； Galβ1.6Galβ1.3Galβ1.4Glc (= 6 ′, 3-diGal-lac)； Galβ1,3Galβ1,6Galβ1,4Glc (= 3 ′, 6-diGal-lac)； Galβ1,3GaIβ1,3Galβ1,4Glc (= 3 ′, 3-diGal-lac)； Galβ1,4Galβ1,4Glc (= 4 ′ Gal-lac) and Galβ1,4GaIβ1,4Galβ1,4Glc (= 4 ′, 4-diGal-lac) and Fucα1,2Galβ1,4Glc (= 2′fucosyllactose). 4. A composition according to any one of the preceding claims, in which the oligosaccharide mixture contains: - �1. Композиция для стимулирования здорового роста кости, и/или профилактики, и/или терапии заболеваний кости, предпочтительно остеомаля
