The present invention relates to a cosmetic composition and / or dermatological and / or therapeutic, comprising as active ingredient, a thermal water which is rich in mineral salts, in order to improve the barrier function of the epithelial cells, in which the cells of the skin. This action takes place via two different biochemical: on the one hand, by promoting the synthesis of filaggrin in order to restore the barrier function of the stratum corneum, on the other hand, by promoting the synthesis of peter pan 4 in order to restore the barrier function of the stratum granulosum.
