The present invention concerns a therapy aimed at language and/or social skills in infants through administration of components stimulating the development of a healthy intestinal flora.

A method is for stimulating the growth of bacteria of the Bacteroidetes phylum in the gut microbiota of a mammal. The method includes administering a yeast product as a prebiotic agent to the mammal. The yeast product comprises the walls of yeast cells, such as those of the genera Saccharomyces, Pichia, Candida, Kluyveromyces, Yarrowia and/or Wickehomomyces, or a fraction thereof.

A problem to be solved by the present invention is to find a component for preventing the onset of bronchitis from breast milk, to provide a novel nutritional composition. The present invention relates to a nutritional composition for preventing the onset of bronchitis wherein N-acetylneuraminic acid, 6-sialyllactose, -2,6-disialo N-linked glycan, or a disialo N-linked glycan with a specific structure are contained as active ingredients. This nutritional composition is an effective composition not only for infants but also for elderly people and people with underlying diseases who are at high risk of contracting the bronchitis, so the composition is efficacious as the nutritional composition for preventing the onset of bronchitis when it is added to foods and nutritional compositions for adults and the elderly.

The present invention relates to the field of dry or powder dairy compositions. The invention provides a method for producing a lactose reduced dairy powder comprising treating a lactose comprising milk-based substrate with a first enzyme having transgalactosylase activity and a second enzyme having lactase activity to obtain a lactose reduced and galacto-oligosaccharides (GOS) comprising milk-based product; and preparing lactose reduced dairy powder from the lactose reduced and GOS comprising milk-based product.