Use of vegetable-oil unsaponifiables for the preparation of a medicament stimulating the expression of TGF-beta or the expression of PAI-1 inhibitor of the plasminogen activator

The invention concerns the use of at least one unsaponifiable matter of vegetable oil, in particular of avocado, soybean and/or lupine oils, for preparing a medicine designed to stimulate the expression of TGF- beta or the expression of the plasminogen activator PAI-1 inhibitor. The invention also concerns a cosmetic treatment method comprising the application of at least one unsaponifiable matter of a vegetable oil and the use thereof as additive in food for human being and/or animal.