Provided is a use of one or more members selected from the groupconsisting of L-ascorbic acid, an L-ascorbic acid derivative, and a salt thereof as a effective ingredient(s) in an external dermal composition for anti-ageing, which composition further comprises an aqueous medium as a base material. The L-ascorbic acid derivative may be a glycosyl-, acyl-, or phosphorylated-derivative of L-ascorbic acid. Further provided is a method for producing an external dermal composition for anti-ageing or a skin care comprising the external dermal composition.
