Skin care agents containing combinations of active agents consisting of vitamin a derivatives and UBI- or plastoquinones

A method for treating and preventing acne, light-aging, light-aged skin, and undesired pigmentation of the skin, comprising topically applying to skin to be treated a composition containing:

• one or more compounds of group (A), which consists of vitamin A acid, all-trans retinoic acid, retinoic acid, isomers of retinoic acid, in which isomers one or more double bonds are present in cis-configuration instead of trans configuration, esters of the aforementioned compounds, where carboxylic acid groups are esterified with alcohols, and salts of the aforementioned compounds,
• wherein the quantity of the compound(s) of group (A) is reduced while maintaining effectivity of the method, if the compound(s) of group (A) is(are) combined with one or more compounds of group (B), which consists of ubiquinones, plastoquinones and derivatives thereof.