| 摘要 |
The present invention relates to an agent for preventing and treating skin diseases comprising as an active ingredient an ascorbic acid derivative which is a compound represented by the following formula (1) or a salt thereof and which per se exhibits no anti-oxidation activity but is capable of transforming in vivo into a compound having an anti-oxidation activity;wherein R1 represents a group capable of bonding to the carbon at the 2-position of the ascorbic acid skeleton through an ether or ester bond and transformable in vivo into a hydroxyl group, and R2 to R4 may be the same or different and each represents a hydroxyl group or a group derived therefrom.
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