Enhancer epithelial cell-cell adhesion for use in improving treatment and prevention of allergic diseases

1-kestose and / or nystose and a divalent metal cation for use in improving, treating or preventing allergic diseases, in which 1-kestose and / or nystose and the divalent metal cation act as an enhancer of cell adhesion -celula for activating epithelial cell, and wherein the divalent metal cation is calcium ion.