Cosmetic use of a lysate of at least one microorganism of Bifidobacteriumspecies and/or one of its fractions, for the preparation of a composition for controlling seborrhea, and to treat and/or prevent oily skin or skin having oily tendency and associated skin disorders, is claimed. An independent claim is included for a cosmetic and/or dermatological composition, for preventing and/or treating oily skin, comprising at least the lysate of at least one microorganism of Bifidobacteriumspecies and/or one of its fractions, in a medium, in combination with at least one anti-seborrheic active agent. ACTIVITY : Antiseborrheic； Dermatological. MECHANISM OF ACTION : Ribonuclease stimulator.
