Anhydrous composition for bleaching human hair comprises a bleaching or lightening agent and 0.001-10 wt.% of a ubiquinone (I). Anhydrous composition for bleaching human hair comprises a bleaching or lightening agent and 0.001-10 wt.% of a ubiquinone of formula (I): n = 1-10. An Independent claim is included for a method for bleaching and lightening human hair, comprising mixing an anhydrous composition containing a bleaching or lightening agent with an aqueous hydrogen peroxide composition containing 0.001-10 wt.% (I) and applying the mixture to the hair.
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