A peptide, with the sequence (AA)n-Arg-Gly-Ser-(AA)n, where (AA) is any amino acid or a derivative thereof and n=0 to 3, as an active ingredient in or for the preparation of a cosmetic and/or dermatological and/or pharmaceutical preparation. The invention also relates to the use thereof for the treatment, amongst others, of the effects of cutaneous aging and/or the use thereof against cellulite, to a composition comprising the same and to a cosmetic method for the treatment of the skin using said peptide or the composition.