Disclosed is a cosmetic treatment method for the skin, in particular for preventing and/or repairing the signs of skin ageing, that includes administering, and in particular applying topically to the skin, a composition containing, in a cosmetically acceptable vehicle, a compound of general formula (I): (formula I) in which R1, R2, R3, R4, R5, R6, R7 and R8, which may be identical or different, each represent a hydrogen atom, a halogen atom, a hydroxyl group, a linear or branched, saturated or unsaturated, C1-C16 hydrocarbon radical, or an —；OR′； radical in which R′； represents a linear or branched, saturated or unsaturated, C1-C16 hydrocarbon radical, at least one group from R1, R2, R3, R4, R5, R6, R7 and R8 not representing a hydrogen atom or a halogen atom, Z represents a covalent bond or a spacer arm, or one of the salts of same.
