Synergistic combinations of active substance for the cosmetic or dermatological care of the skin, hair & nails

摘要

PCT No. PCT/DE93/01166 Sec. 371 Date Aug. 11, 1995 Sec. 102(e) Date Aug. 11, 1995 PCT Filed Dec. 7, 1993 PCT Pub. No. WO94/14412 PCT Pub. Date Jul. 7, 1994Cosmetic and/or dermatological active compound combinations comprising a) an active amount of biotin and/or biotin esters, b) an active amount of one or more alpha -hydroxycarboxylic acids of the formula R'(R'')(OH)C COOHand/or an active amount of one or more alpha -ketocarboxylic acids of the formula R'C(O) COOHor their physiologically acceptable salts or esters wherein R' and R'' represent H-; branched or unbranched C1-25-alkyl- or C1-25-alkyl-substituted by one or more carboxyl groups and/or hydroxyl groups and/or a aldehyde groups and/or oxo groups (keto groups); phenyl- or phenyl substituted by one or more carboxyl groups and/or hydroxyl groups and/or branched and/or unbranched C1-25-alkyl groups; or wherein the alpha -carbon atom of the alpha -hydroxycarboxylic acid, together with R' and R'', forms a cycloalkyl group having 3 to 7 ring atoms or the cycloalkyl substituted by one or more carboxyl groups and/or hydroxyl groups and/or oxo groups (keto groups) and/or branched and/or unbranched C1-25-alkyl groups; and c) an active amount of one or more antioxidants.