| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a highly stable external preparation for skin which is preferable for whitening cosmetic.SOLUTION: An external preparation for skin contains 4-alkylresorcinol and/or salts thereof at 0.001 mass% to 5 mass% with respect to the total amount of the external preparation for skin, ascorbic acid, ascorbic acid derivative and/or salts thereof at 0.01 mass% to 10 mass% with respect to the total amount of the external preparation for skin, and tranexamic acid, tranexamic acid derivative and/or salts thereof at 0.01 mass% to 10 mass% with respect to the total amount of the external preparation for skin, in which the external preparation for skin contains one type or two types or more selected from the group consisting of oxalic acid, salt thereof, and glutathione.</p> |
