The present invention relates to a cosmetic composition for skin moisturizing comprising a nano-emulsion, which contains a fermented product of a tissue cultured wild ginseng root extract with increased antioxidant activity, as an effective component. The nano-emulsion of the present invention has high percutaneous absorption rate, and thus the fermented product extracted from the tissue cultured wild ginseng root can be efficiently delivered into the skin. Through the excellent antioxidant activity of the fermented product of the tissue cultured wild ginseng root extract, the cosmetic composition for skin moisturizing comprising the nano-emulsion of the present invention can be used as a functional cosmetic product with moisturization and antiaging effects such as skin wrinkle reduction, etc.
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