The present invention relates to the use of a plant oil product as an agent for increasing the synthesis of skin lipids, especially the lipids of the epidermal skin barrier, in or for the preparation of a cosmetic, pharmaceutical or dermatological composition. The invention also relates to a method for cosmetic treatment with a cosmetic, pharmaceutical or dermatological composition for increasing the synthesis of skin lipids, especially the lipids of the epidermal skin barrier, and to the use of the plant product as a food additive.