| 摘要 |
PURPOSE:To obtain a cosmetic for preventing aging of skin, excellent in effects for preventing aging of skin (proliferation of epiderm, promotion of differentiation, turn over promotion of corneal layer, improvement of corneum, skin- beautifying effect, etc.). CONSTITUTION:A cosmetic composition for preventing aging of skin is obtained by blending extracts of a plant belonging to the genus Betula or Alnus of Betulaceae (e.g. Betula platyphylla or Alnus japonica). As the extracting solvents for plant extracts, benzene, ethyl ether, chloroform, methylene chloride, ethyl acetate, butyl acetate, acetone, methanol, ethanol or 1,3-butylene glycol and water, etc., are preferably used, though these solvents are not especially limited. These extracts are blended in amounts of 0.001-2wt.% based on cosmetic composition. |
