Whitening cosmetic

摘要

Compositions, comprising
(A) a cysteine derivative represented by the formula (I) or a salt thereof:;
wherein
X and Y are each independently OR1 or NHR2 wherein R1 and R2 are each independently a hydrogen atom or a C1-22 alkyl group;Z is a hydrogen atom or a C1-22 alkyl group; andW is a C1-22 alkyl group, a C1-22 alkoxy group or a C1-22 alkylamino group, and(B) a whitening agent,are useful for whitening skin and reducing melanin production.

主权项

1. A cosmetic agent, comprising:
(A) at least one cysteine compound represented by formula (I) or a salt thereof:wherein
X and Y are each independently OR1 or NHR2 wherein R1 and R2 are each independently a hydrogen atom or a C1-22 alkyl group; Z is a hydrogen atom or a C 1-22 alkyl group; and W is a C1-22 alkyl group, a C1-22 alkoxy group or a C 1-22 alkylamino group; and (B) at least one whitening agent, wherein: (A) said at least one cysteine compound or a salt thereof is one or more members selected from the group consisting of N-acetyl-2-methylthiazolidine-2,4-dicarboxylic acid, a salt of N-acetyl-2-methylthiazolidine-2,4-dicarboxylic acid, N-acetyl-2-methylthiazolidine-2,4-dicarboxylic acid 2-ethyl ester, and a salt of N-acetyl-2-methylthiazolidine-2,4-dicarboxylic acid 2-ethyl ester; and (B) said at least one whitening agent is one or more members selected from the group consisting of arbutin, cetyl ascorbyl ether, kojic acid, 4-methoxy salicylic acid, chamomilla recutita extract, ellagic acid, linoleic acid, glutathione, tranexamic acid, 4-n-butylresorcinol, and 4-hexylresorcinol.