| abstract |
【Task】 To provide a skin aging preventive composition useful for the prevention, prevention and improvement of skin aging, which exhibits the same action as retinoic acid and retinoic acid derivatives on the proliferation and differentiation of epidermal cells. [Solution] An anti-skin aging and skin external composition comprising an extract of cyanobacteria, in particular, the genus Aphanizomenon and Aphanizomenon flos-aquae. |