Peptides with general formula (I): R1-AA1-AA2-AA3-AA4-R2 (I) its stereoisomers, mixtures thereof, and its cosmetically or pharmaceutically acceptable salts, a method of preparation, cosmetic or pharmaceutical compositions containing them and their use for the treatment and/or care of conditions, disorders and/or pathologies of the skin, mucous membranes, scalp and/or hair.本發明揭示具有通式(I)之肽類:R1-AA1-AA2-AA3-AA4-R2(I)其立體異構物、其混合物及其美容或藥學可接受之鹽類;一種製備方法;含彼等之美容或藥學組成物;及其用於皮膚、黏膜、頭皮及/或頭髮之狀態、失調及/或病變的治療及/或保養的用途。