The present invention relates to a method for preparing an extract of at least one bacterium of the species
Staphylococcus epidermidis comprising at least one step of culturing at least one bacterium of the species
Staphylococcus epidermidis in the presence of a culture medium comprising i) at least one
monosaccharide, ii) at least one peptone of vegetable origin and / or at least one
yeast extract, and optionally iii) at least one microelement. The present invention is also directed to an extract of at least one bacterium of the species
Staphylococcus epidermidis, preferably an extract of at least one
bacterial strain of the species
Staphylococcus epidermidis selected from the group consisting of
bacteria deposited at the CNCM under the serial numbers I-5688, I-5689, I-5904, I-5691, I-5692, I-5693, I-5694 and I-5695, obtainable, obtained or directly obtained by the abovementioned preparation method. The present invention is further directed to a
biomass extract of at least one
bacterial strain of the species
Staphylococcus epidermidis selected from the group consisting of
bacteria deposited at the CNCM under the serial numbers I-5688, I-5689, I-5904, I-5691, I-5692, I-5693, I-5694 and I-5695. The present invention also relates to cosmetic treatment methods and cosmetic uses of said extracts for caring for
keratin materials, for preventing and / or treating signs of aging of
keratin materials, and as active anti-aging agent.