PROBLEM TO BE SOLVED: To provide cosmetics or a skin external preparations containing as an active ingredient an ascorbic acid derivative which is excellent in collagen production promoting effect and is excellent in solubility to oil solutions.SOLUTION: The present invention provides a cosmetic or skin external preparation characterized by containing as an active ingredient an ascorbic acid derivative in which the hydrogen of the hydroxyl group in position 2, 3, 5, and 6 of ascorbic acid is substituted by a methyl group, or a straight or branched chain alkyl or alkenyl group having 7 to 21 carbon atoms, at least one of the hydrogen of the hydroxyl group in position 2, 3, 5, and 6 is substituted by a methyl group, and other at least one is substituted by a straight or branched chain alkyl or alkenyl group having 7 to 21 carbon atoms, the cosmetic or skin external preparation being excellent in collagen production promoting effect and also in solubility to oil solutions.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】コラーゲン産生促進効果に優れるとともに、油剤への溶解性も優れるアスコルビン酸誘導体を有効成分として含有する化粧料又は皮膚外用剤を提供する。【解決手段】アスコルビン酸の2、3、5及び6位の水酸基の水素が、メチル基、又は直鎖状もしくは分岐状の炭素数7~21のアルキル基もしくはアルケニル基で置換されており、2、3、5及び6位の水酸基の水素の少なくとも1つはメチル基で置換されており、他の少なくとも1つは直鎖状もしくは分岐状の炭素数7~21のアルキル基又はアルケニル基で置換されておるアスコルビン酸誘導体を有効成分として含有することを特徴としコラーゲン産生促進効果に優れるとともに油剤への溶解性も優れる化粧料又は皮膚外用剤。【選択図】 なし
