Disclosed in the application is a raw milk preparation for use for treating or preventing childhood asthma and allergic diseases and methods of producing the raw milk preparation for use for treating or preventing childhood asthma and allergic diseases. Also disclosed is the use of the a raw milk preparation as nutritional supplement for a female human being during pregnancy, as a preparation for a planned pregnancy and/or during nursing of the infant or for an infant or child from birth to at least until completion of the 1st or 3rd year of age.