The present invention provides a Lactobacillus pentosus-GFC LP strain (Entrustment No. KCCM11950P), and the strain is grafted onto a lespedeza cuneata G.Don extract and cultivated to manufacture a sericea lespedeza fermented extract. Accordingly, staphylococcus epidermidis, which is beneficial for skin, is increased, and moreover, the present invention has an excellent effect of improving skin elasticity and reducing wrinkles, thereby bringing an excellent effect as a cosmetic composition when applied to a cosmetic base as an effective component.
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