| abstract |
(57) [Summary] PROBLEM TO BE SOLVED: To sustain the action of vitamin C, to express it more effectively, to enhance percutaneous absorption, and to allow vitamin C to act more effectively inside the dermal layer, especially acne and liquor. A cosmetic or external preparation suitable for treating, improving, and preventing seborrheic dermatitis is provided. The present invention comprises at least one of esters and ethers of ascorbic acid and at least one of a phospholipid and a polyalkylene glycol-diisocyanate copolymer, for example, a polyalkylene glycol methylene diisocyanate cyclohexane polymer. The above problem can be solved by an ascorbic acid derivative composition for skin (the ester and ether may be in the form of a salt). |