The invention relates to complexes of certain flavonoid derivatives, of the formula I compositions which comprise such derivatives, corresponding processes for the preparation of the flavonoid derivatives or of compositions comprising same, and the use thereof, in particular for the care, preservation or improvement of the general state of the skin or hair. Formula (1), in which Z.sub.1 to Z.sub.4 and Z.sub.6 to Z.sub.10 each, independently of one another, denote H, OH, CH.sub.3COO, alkoxy, hydroxyalkoxy, mono- or oligoglycoside radicals and where the alkoxy and hydroxyalkoxy groups may be branched and unbranched and can have 1 to 18 C atoms. Formula (II) denotes, Z.sub.5 is a mono- or the oligoglycoside radical, where bonded to this glycoside radical, in each case via an --O-- group, is at least one radical selected from certain benzo molecule.