This invention relates to the cosmetic use of at least one compound of formula (i) wherein A1 is the radical corresponding to D- or L-Ser A2 is the radical corresponding to D- or L-Asp or Glu and A3 is the radical corresponding to D- or L-Lys, Arg or Orn and A4 is the radical corresponding to D- or L-pro, R1 and R2 and R3 are as defined in the claims as anti-aging and restructuring agents.