| abstract |
(57) [Summary] [Purpose] To provide a percutaneous absorption enhancer having high integrity and an excellent action for promoting percutaneous absorption, and a skin external preparation containing the same. [Structure] Phosphatidylserine represented by the following general formula (I) is used as a percutaneous absorption enhancer and incorporated into a skin external preparation. Embedded image However, in the formula (I), R 1 and R 2 each independently represent an acyl group having 13 to 21 carbon atoms, and at least one of R 1 and R 2 has an unsaturated bond. |