The present invention relates to products and methods for preventing, ameliorating and/or treating infections and other diseases. In one aspect, the products of the present invention relates to compositions comprising germ free colostrum. In another aspect, the products of the present invention relates to compositions comprising synthetically multimerised immunoglobulins. In a third aspect, the products of the present invention relates to compositions comprising germ free colostrum enriched with synthetically multimerised immunoglobulins. The invention also relates to use of said compositions as a pharmaceutical e.g. for prophylactic or ameliorating treatment of infections and other diseases. In addition the invention comprises methods for production of said compositions.