Cosmetic or pharmaceutical composition comprises a peptide or polypeptide fragment of solute carrier family 24, member 5(SLC24A5) protein or its biologically active derivative, comprising 4-50, preferably 4-8 amino acid residues, and of which sequence comprises a peptide sequence (I), in a medium. Cosmetic or pharmaceutical composition comprises a peptide or polypeptide fragment of solute carrier family 24, member 5(SLC24A5) protein or its biologically active derivative, comprising 4-50, preferably 4-8 amino acid residues, and of which sequence comprises a peptide sequence of formula ((AA) n-Thr-X1-X2-Ala-(AA) p) (I), in a medium. X1 : any aliphatic amino acid (Leu, Val, Ala or Ile)； X2 : phenylalanine or any aliphatic amino acid； AA : any amino acid or one of its derivatives； and n and p : 0-4. An independent claim is included for a process for cosmetic treatment comprising applying the composition topically on the area to be treated. ACTIVITY : Dermatological. MECHANISM OF ACTION : None given. No biological data given.
